Strict unique validation failing on inherited synthetic methods

[TropheusJ]

I have this mixin, causing this crash when -Dmixin.debug.strict.unique is set to true:

Caused by: org.spongepowered.asm.mixin.transformer.throwables.InvalidMixinException: Method conflict, synthetic method getChunk in porting_lib_level_events.mixins.json:ServerLevelMixin from mod porting_lib_level_events cannot overwrite getChunk(II)Lnet/minecraft/world/level/chunk/ChunkAccess; in net.minecraft.server.level.ServerLevel
	at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.attachUniqueMethod(MixinPreProcessorStandard.java:546) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
	at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.attachMethods(MixinPreProcessorStandard.java:351) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
	at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.attach(MixinPreProcessorStandard.java:299) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
	at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.createContextFor(MixinPreProcessorStandard.java:277) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
	at org.spongepowered.asm.mixin.transformer.MixinInfo.createContextFor(MixinInfo.java:1289) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
	at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.apply(MixinApplicatorStandard.java:294) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
	at org.spongepowered.asm.mixin.transformer.TargetClassContext.apply(TargetClassContext.java:422) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
	at org.spongepowered.asm.mixin.transformer.TargetClassContext.applyMixins(TargetClassContext.java:403) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
	at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:363) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
	at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClass(MixinTransformer.java:234) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
	at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClassBytes(MixinTransformer.java:202) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
	at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.getPostMixinClassByteArray(KnotClassDelegate.java:422) ~[fabric-loader-0.15.11.jar:?]
	at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.tryLoadClass(KnotClassDelegate.java:323) ~[fabric-loader-0.15.11.jar:?]
	at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.loadClass(KnotClassDelegate.java:218) ~[fabric-loader-0.15.11.jar:?]
	at net.fabricmc.loader.impl.launch.knot.KnotClassLoader.loadClass(KnotClassLoader.java:119) ~[fabric-loader-0.15.11.jar:?]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:526) ~[?:?]
	at net.minecraft.server.Bootstrap.bootStrap(Bootstrap.java:54) ~[minecraft-merged-1d33bee882-1.20.1-loom.mappings.1_20_1.layered+hash.2198-v2.jar:?]
	at net.minecraft.client.main.Main.main(Main.java:166) ~[minecraft-merged-1d33bee882-1.20.1-loom.mappings.1_20_1.layered+hash.2198-v2.jar:?]
	at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:470) ~[fabric-loader-0.15.11.jar:?]
	... 3 more

I'm guessing getChunk is inherited somehow due to the mixin extending Level.