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 aff70cb1591..a9d06496f65 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
@@ -249,7 +249,7 @@ object DIAGNOSTICS_LIST : DiagnosticList("FirErrors") {
             parameter<FqName>("optInMarkerFqName")
             parameter<String>("message")
         }
-        val EXPERIMENTAL_API_USAGE_ERROR by error<PsiElement>(PositioningStrategy.REFERENCE_BY_QUALIFIED) {
+        val EXPERIMENTAL_API_USAGE_ERROR by warning<PsiElement>(PositioningStrategy.REFERENCE_BY_QUALIFIED) {
             parameter<FqName>("optInMarkerFqName")
             parameter<String>("message")
         }
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 ab67385f725..a842b8081fd 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
@@ -214,7 +214,7 @@ object FirErrors {
 
     // OptIn-related
     val EXPERIMENTAL_API_USAGE by warning2<PsiElement, FqName, String>(SourceElementPositioningStrategies.REFERENCE_BY_QUALIFIED)
-    val EXPERIMENTAL_API_USAGE_ERROR by error2<PsiElement, FqName, String>(SourceElementPositioningStrategies.REFERENCE_BY_QUALIFIED)
+    val EXPERIMENTAL_API_USAGE_ERROR by warning2<PsiElement, FqName, String>(SourceElementPositioningStrategies.REFERENCE_BY_QUALIFIED)
     val EXPERIMENTAL_OVERRIDE by warning2<PsiElement, FqName, String>()
     val EXPERIMENTAL_OVERRIDE_ERROR by error2<PsiElement, FqName, String>()
     val EXPERIMENTAL_IS_NOT_ENABLED by warning0<KtAnnotationEntry>(SourceElementPositioningStrategies.REFERENCED_NAME_BY_QUALIFIED)