Mod development, crash report

[noahkungen3]

When I just recently added in armour to my mod it crashed when trying to launch and I don't know why, please help.

Link to crash report: https://pastebin.com/AiS5N8RE

 

[adamich]

java.lang.RuntimeException: One of more entry values did not copy to the correct id. Check log for details!
at net.minecraftforge.registries.ForgeRegistry.sync(ForgeRegistry.java:547)

Block Id conflict as I see. Please, post latest log, not crash.log