diff --git a/core/src/com/unciv/models/ruleset/unique/UniqueType.kt b/core/src/com/unciv/models/ruleset/unique/UniqueType.kt
index 6f120ba3d3..7a2c54be23 100644
--- a/core/src/com/unciv/models/ruleset/unique/UniqueType.kt
+++ b/core/src/com/unciv/models/ruleset/unique/UniqueType.kt
@@ -705,15 +705,15 @@ enum class UniqueType(val text: String, vararg targets: UniqueTarget, val flags:
 
     // region DEPRECATED AND REMOVED
 
-    @Deprecated("as of 4.1.7", ReplaceWith("Can construct [improvementName] <if it hasn't used other actions yet>"))
+    @Deprecated("as of 4.1.7", ReplaceWith("Can construct [improvementName] <if it hasn't used other actions yet>"), DeprecationLevel.ERROR)
     CanConstructIfNoOtherActions("Can construct [improvementName] if it hasn't used other actions yet", UniqueTarget.Unit),
-    @Deprecated("s of 4.1.14", ReplaceWith("Production to [Science] conversion in cities changed by [33]%"))
+    @Deprecated("s of 4.1.14", ReplaceWith("Production to [Science] conversion in cities changed by [33]%"), DeprecationLevel.ERROR)
     ProductionToScienceConversionBonus("Production to science conversion in cities increased by 33%", UniqueTarget.Global),
-    @Deprecated("As of 4.1.19", ReplaceWith("[+100]% Yield from every [Natural Wonder]"))
+    @Deprecated("As of 4.1.19", ReplaceWith("[+100]% Yield from every [Natural Wonder]"), DeprecationLevel.ERROR)
     DoubleStatsFromNaturalWonders("Tile yields from Natural Wonders doubled", UniqueTarget.Global),
-    @Deprecated("As of 4.1.14", ReplaceWith("Enables conversion of city production to [Gold]"))
+    @Deprecated("As of 4.1.14", ReplaceWith("Enables conversion of city production to [Gold]"), DeprecationLevel.ERROR)
     EnablesGoldProduction("Enables conversion of city production to gold", UniqueTarget.Global),
-    @Deprecated("s of 4.1.14", ReplaceWith("Enables conversion of city production to [Science]"))
+    @Deprecated("s of 4.1.14", ReplaceWith("Enables conversion of city production to [Science]"), DeprecationLevel.ERROR)
     EnablesScienceProduction("Enables conversion of city production to science", UniqueTarget.Global),
     @Deprecated("as of 4.0.3", ReplaceWith("Damage is ignored when determining unit Strength <for [All] units>"), DeprecationLevel.ERROR)
     UnitsFightFullStrengthWhenDamaged("Units fight as though they were at full strength even when damaged", UniqueTarget.Global),