diff --git a/compiler/frontend/src/org/jetbrains/kotlin/diagnostics/rendering/DefaultErrorMessages.java b/compiler/frontend/src/org/jetbrains/kotlin/diagnostics/rendering/DefaultErrorMessages.java
index f3a08f6ff4a..11e4143773b 100644
--- a/compiler/frontend/src/org/jetbrains/kotlin/diagnostics/rendering/DefaultErrorMessages.java
+++ b/compiler/frontend/src/org/jetbrains/kotlin/diagnostics/rendering/DefaultErrorMessages.java
@@ -175,7 +175,7 @@ public class DefaultErrorMessages {
 
         MAP.put(EXPERIMENTAL_ANNOTATION_ON_WRONG_TARGET, "Opt-in requirement marker annotation cannot be used on {0}", STRING);
         MAP.put(EXPERIMENTAL_ANNOTATION_ON_OVERRIDE, "Opt-in requirement marker annotation on override requires the same marker on base declaration");
-        MAP.put(EXPERIMENTAL_ANNOTATION_ON_OVERRIDE_WARNING, "Opt-in requirement marker annotation on override requires the same marker on base declaration (will be an error in 1.6)");
+        MAP.put(EXPERIMENTAL_ANNOTATION_ON_OVERRIDE_WARNING, "Opt-in requirement marker annotation on override makes no sense without the same marker on base declaration");
 
         MAP.put(EXPERIMENTAL_UNSIGNED_LITERALS, "{0}", STRING);
         MAP.put(EXPERIMENTAL_UNSIGNED_LITERALS_ERROR, "{0}", STRING);
diff --git a/compiler/util/src/org/jetbrains/kotlin/config/LanguageVersionSettings.kt b/compiler/util/src/org/jetbrains/kotlin/config/LanguageVersionSettings.kt
index 4a40ec20ec6..a2151d7c907 100644
--- a/compiler/util/src/org/jetbrains/kotlin/config/LanguageVersionSettings.kt
+++ b/compiler/util/src/org/jetbrains/kotlin/config/LanguageVersionSettings.kt
@@ -211,7 +211,6 @@ enum class LanguageFeature(
     TypeInferenceOnCallsWithSelfTypes(KOTLIN_1_6),
     WarnAboutNonExhaustiveWhenOnAlgebraicTypes(KOTLIN_1_6, kind = BUG_FIX),
     InstantiationOfAnnotationClasses(KOTLIN_1_6),
-    OptInOnOverrideForbidden(KOTLIN_1_6, kind = BUG_FIX),
     OptInContagiousSignatures(KOTLIN_1_6, kind = BUG_FIX),
     RepeatableAnnotations(KOTLIN_1_6),
     RepeatableAnnotationContainerConstraints(KOTLIN_1_6, kind = BUG_FIX),
@@ -234,6 +233,8 @@ enum class LanguageFeature(
 
     // Temporarily disabled, see KT-27084/KT-22379
     SoundSmartcastFromLoopConditionForLoopAssignedVariables(sinceVersion = null, kind = BUG_FIX),
+    // Disabled for indefinite time. See KT-48535 and related discussion
+    OptInOnOverrideForbidden(sinceVersion = null, kind = BUG_FIX),
 
     // Experimental features