diff --git a/analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/diagnostics/KtFirDataClassConverters.kt b/analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/diagnostics/KtFirDataClassConverters.kt
index 2b367a5bb2a..02b28f85fb5 100644
--- a/analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/diagnostics/KtFirDataClassConverters.kt
+++ b/analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/diagnostics/KtFirDataClassConverters.kt
@@ -3779,16 +3779,6 @@ internal val KT_DIAGNOSTIC_CONVERTER = KtDiagnosticConverterBuilder.buildConvert
             token,
         )
     }
-    add(FirErrors.AMBIGUOUS_ACTUALS) { firDiagnostic ->
-        AmbiguousActualsImpl(
-            firSymbolBuilder.buildSymbol(firDiagnostic.a),
-            firDiagnostic.b.map { firBasedSymbol ->
-                firSymbolBuilder.buildSymbol(firBasedSymbol)
-            },
-            firDiagnostic as KtPsiDiagnostic,
-            token,
-        )
-    }
     add(FirErrors.AMBIGUOUS_EXPECTS) { firDiagnostic ->
         AmbiguousExpectsImpl(
             firSymbolBuilder.buildSymbol(firDiagnostic.a),
diff --git a/analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/diagnostics/KtFirDiagnostics.kt b/analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/diagnostics/KtFirDiagnostics.kt
index 2ed9da48d32..57e91d7c1b4 100644
--- a/analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/diagnostics/KtFirDiagnostics.kt
+++ b/analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/diagnostics/KtFirDiagnostics.kt
@@ -2642,12 +2642,6 @@ sealed interface KtFirDiagnostic<PSI : PsiElement> : KtDiagnosticWithPsi<PSI> {
         val compatibility: Map<ExpectActualCompatibility<FirBasedSymbol<*>>, List<KtSymbol>>
     }
 
-    interface AmbiguousActuals : KtFirDiagnostic<KtNamedDeclaration> {
-        override val diagnosticClass get() = AmbiguousActuals::class
-        val declaration: KtSymbol
-        val candidates: List<KtSymbol>
-    }
-
     interface AmbiguousExpects : KtFirDiagnostic<KtNamedDeclaration> {
         override val diagnosticClass get() = AmbiguousExpects::class
         val declaration: KtSymbol
diff --git a/analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/diagnostics/KtFirDiagnosticsImpl.kt b/analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/diagnostics/KtFirDiagnosticsImpl.kt
index 663ede133e8..8d6403bfcd3 100644
--- a/analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/diagnostics/KtFirDiagnosticsImpl.kt
+++ b/analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/diagnostics/KtFirDiagnosticsImpl.kt
@@ -3183,13 +3183,6 @@ internal class ActualWithoutExpectImpl(
     token: KtLifetimeToken,
 ) : KtAbstractFirDiagnostic<KtNamedDeclaration>(firDiagnostic, token), KtFirDiagnostic.ActualWithoutExpect
 
-internal class AmbiguousActualsImpl(
-    override val declaration: KtSymbol,
-    override val candidates: List<KtSymbol>,
-    firDiagnostic: KtPsiDiagnostic,
-    token: KtLifetimeToken,
-) : KtAbstractFirDiagnostic<KtNamedDeclaration>(firDiagnostic, token), KtFirDiagnostic.AmbiguousActuals
-
 internal class AmbiguousExpectsImpl(
     override val declaration: KtSymbol,
     override val modules: List<FirModuleData>,
diff --git a/compiler/fir/checkers/checkers-component-generator/src/org/jetbrains/kotlin/fir/checkers/generator/diagnostics/FirDiagnosticsList.kt b/compiler/fir/checkers/checkers-component-generator/src/org/jetbrains/kotlin/fir/checkers/generator/diagnostics/FirDiagnosticsList.kt
index 3a603cdb14b..f556b3f07af 100644
--- a/compiler/fir/checkers/checkers-component-generator/src/org/jetbrains/kotlin/fir/checkers/generator/diagnostics/FirDiagnosticsList.kt
+++ b/compiler/fir/checkers/checkers-component-generator/src/org/jetbrains/kotlin/fir/checkers/generator/diagnostics/FirDiagnosticsList.kt
@@ -1285,11 +1285,6 @@ object DIAGNOSTICS_LIST : DiagnosticList("FirErrors") {
             parameter<Map<out ExpectActualCompatibility<Symbol>, Collection<Symbol>>>("compatibility")
         }
 
-        val AMBIGUOUS_ACTUALS by error<KtNamedDeclaration>(PositioningStrategy.INCOMPATIBLE_DECLARATION) {
-            parameter<Symbol>("declaration")
-            parameter<Collection<Symbol>>("candidates")
-        }
-
         val AMBIGUOUS_EXPECTS by error<KtNamedDeclaration>(PositioningStrategy.INCOMPATIBLE_DECLARATION) {
             parameter<Symbol>("declaration")
             parameter<Collection<FirModuleData>>("modules")
diff --git a/compiler/fir/checkers/gen/org/jetbrains/kotlin/fir/analysis/diagnostics/FirErrors.kt b/compiler/fir/checkers/gen/org/jetbrains/kotlin/fir/analysis/diagnostics/FirErrors.kt
index ab5ece4c35a..cdeaf2df33d 100644
--- a/compiler/fir/checkers/gen/org/jetbrains/kotlin/fir/analysis/diagnostics/FirErrors.kt
+++ b/compiler/fir/checkers/gen/org/jetbrains/kotlin/fir/analysis/diagnostics/FirErrors.kt
@@ -677,7 +677,6 @@ object FirErrors {
     val EXPECTED_FUNCTION_SOURCE_WITH_DEFAULT_ARGUMENTS_NOT_FOUND: KtDiagnosticFactory0 by error0<PsiElement>()
     val NO_ACTUAL_FOR_EXPECT: KtDiagnosticFactory3<FirBasedSymbol<*>, FirModuleData, Map<ExpectActualCompatibility<FirBasedSymbol<*>>, Collection<FirBasedSymbol<*>>>> by error3<KtNamedDeclaration, FirBasedSymbol<*>, FirModuleData, Map<ExpectActualCompatibility<FirBasedSymbol<*>>, Collection<FirBasedSymbol<*>>>>(SourceElementPositioningStrategies.INCOMPATIBLE_DECLARATION)
     val ACTUAL_WITHOUT_EXPECT: KtDiagnosticFactory2<FirBasedSymbol<*>, Map<out ExpectActualCompatibility<FirBasedSymbol<*>>, Collection<FirBasedSymbol<*>>>> by error2<KtNamedDeclaration, FirBasedSymbol<*>, Map<out ExpectActualCompatibility<FirBasedSymbol<*>>, Collection<FirBasedSymbol<*>>>>(SourceElementPositioningStrategies.DECLARATION_NAME_ONLY)
-    val AMBIGUOUS_ACTUALS: KtDiagnosticFactory2<FirBasedSymbol<*>, Collection<FirBasedSymbol<*>>> by error2<KtNamedDeclaration, FirBasedSymbol<*>, Collection<FirBasedSymbol<*>>>(SourceElementPositioningStrategies.INCOMPATIBLE_DECLARATION)
     val AMBIGUOUS_EXPECTS: KtDiagnosticFactory2<FirBasedSymbol<*>, Collection<FirModuleData>> by error2<KtNamedDeclaration, FirBasedSymbol<*>, Collection<FirModuleData>>(SourceElementPositioningStrategies.INCOMPATIBLE_DECLARATION)
     val NO_ACTUAL_CLASS_MEMBER_FOR_EXPECTED_CLASS: KtDiagnosticFactory2<FirBasedSymbol<*>, List<Pair<FirBasedSymbol<*>, Map<out MismatchOrIncompatible<FirBasedSymbol<*>>, Collection<FirBasedSymbol<*>>>>>> by error2<KtNamedDeclaration, FirBasedSymbol<*>, List<Pair<FirBasedSymbol<*>, Map<out MismatchOrIncompatible<FirBasedSymbol<*>>, Collection<FirBasedSymbol<*>>>>>>(SourceElementPositioningStrategies.ACTUAL_DECLARATION_NAME)
     val ACTUAL_MISSING: KtDiagnosticFactory0 by error0<KtNamedDeclaration>(SourceElementPositioningStrategies.ACTUAL_DECLARATION_NAME)
diff --git a/compiler/fir/checkers/gen/org/jetbrains/kotlin/fir/analysis/diagnostics/FirNonSuppressibleErrorNames.kt b/compiler/fir/checkers/gen/org/jetbrains/kotlin/fir/analysis/diagnostics/FirNonSuppressibleErrorNames.kt
index a1d73bc2ae0..5959330a90e 100644
--- a/compiler/fir/checkers/gen/org/jetbrains/kotlin/fir/analysis/diagnostics/FirNonSuppressibleErrorNames.kt
+++ b/compiler/fir/checkers/gen/org/jetbrains/kotlin/fir/analysis/diagnostics/FirNonSuppressibleErrorNames.kt
@@ -462,7 +462,6 @@ val FIR_NON_SUPPRESSIBLE_ERROR_NAMES: Set<String> = setOf(
     "EXPECTED_FUNCTION_SOURCE_WITH_DEFAULT_ARGUMENTS_NOT_FOUND",
     "NO_ACTUAL_FOR_EXPECT",
     "ACTUAL_WITHOUT_EXPECT",
-    "AMBIGUOUS_ACTUALS",
     "AMBIGUOUS_EXPECTS",
     "NO_ACTUAL_CLASS_MEMBER_FOR_EXPECTED_CLASS",
     "ACTUAL_MISSING",
diff --git a/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/diagnostics/FirErrorsDefaultMessages.kt b/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/diagnostics/FirErrorsDefaultMessages.kt
index c087c37728f..d840b0e8a1d 100644
--- a/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/diagnostics/FirErrorsDefaultMessages.kt
+++ b/compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/diagnostics/FirErrorsDefaultMessages.kt
@@ -74,7 +74,6 @@ import org.jetbrains.kotlin.fir.analysis.diagnostics.FirErrors.ACTUAL_TYPE_ALIAS
 import org.jetbrains.kotlin.fir.analysis.diagnostics.FirErrors.ACTUAL_TYPE_ALIAS_WITH_USE_SITE_VARIANCE
 import org.jetbrains.kotlin.fir.analysis.diagnostics.FirErrors.ACTUAL_WITHOUT_EXPECT
 import org.jetbrains.kotlin.fir.analysis.diagnostics.FirErrors.ADAPTED_CALLABLE_REFERENCE_AGAINST_REFLECTION_TYPE
-import org.jetbrains.kotlin.fir.analysis.diagnostics.FirErrors.AMBIGUOUS_ACTUALS
 import org.jetbrains.kotlin.fir.analysis.diagnostics.FirErrors.AMBIGUOUS_ALTERED_ASSIGN
 import org.jetbrains.kotlin.fir.analysis.diagnostics.FirErrors.AMBIGUOUS_ANNOTATION_ARGUMENT
 import org.jetbrains.kotlin.fir.analysis.diagnostics.FirErrors.AMBIGUOUS_ANONYMOUS_TYPE_INFERRED
@@ -2066,7 +2065,6 @@ object FirErrorsDefaultMessages : BaseDiagnosticRendererFactory() {
             SYMBOL,
             FirPlatformIncompatibilityDiagnosticRenderer.TEXT
         )
-        map.put(AMBIGUOUS_ACTUALS, "''{0}'' has several compatible actual declarations in modules {1}.", SYMBOL, SYMBOLS)
         map.put(AMBIGUOUS_EXPECTS, "''{0}'' has several compatible expect declarations in modules {1}.", SYMBOL, COLLECTION(MODULE_DATA))
         map.put(
             NO_ACTUAL_CLASS_MEMBER_FOR_EXPECTED_CLASS,