error with recipe

[PhanaticD]

using paperspigot for 1.12.2 and massivecore and massivecombat 2.13.7

[18:20:33 WARN]: java.lang.Throwable: Warning: A plugin is creating a recipe using a Deprecated method. This will cause you to receive warnings stating 'Tried to load unrecognized recipe: bukkit:<ID>'. Please ask the author to give their recipe a static key using NamespacedKey.
[18:20:33 WARN]:        at org.bukkit.inventory.ShapelessRecipe.<init>(ShapelessRecipe.java:26)
[18:20:33 WARN]:        at com.massivecraft.massivecombat.engine.EngineCraftingApple.getRecipes(EngineCraftingApple.java:36)
[18:20:33 WARN]:        at com.massivecraft.massivecombat.engine.EngineCraftingAbstract.add(EngineCraftingAbstract.java:136)
[18:20:33 WARN]:        at com.massivecraft.massivecombat.engine.EngineCraftingAbstract.ensureAdded(EngineCraftingAbstract.java:128)
[18:20:33 WARN]:        at com.massivecraft.massivecombat.engine.EngineCraftingAbstract.run(EngineCraftingAbstract.java:69)
[18:20:33 WARN]:        at org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftTask.run(CraftTask.java:63)
[18:20:33 WARN]:        at org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:415)
[18:20:33 WARN]:        at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:833)
[18:20:33 WARN]:        at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:427)
[18:20:33 WARN]:        at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:767)
[18:20:33 WARN]:        at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:665)
[18:20:33 WARN]:        at java.lang.Thread.run(Thread.java:745)