lib/src/main/java/net/tomatentum/marinara/interaction/ident/InteractionIdentifier.java

@@ -80,7 +80,7 @@ public class InteractionIdentifier {
             return false;
         if (!name().equals(ident.name()))
             return false;
-        return Objects.equals(ident, obj);
+        return Objects.equals(parent(), ident.parent());
     }
 
     @Override

lib/src/main/java/net/tomatentum/marinara/registry/InteractionEntry.java

@@ -36,7 +36,7 @@ public class InteractionEntry {
     public InteractionEntry addMethod(InteractionMethod method) {
         InteractionIdentifier identifier = method.identifier();
 
-        if (this.identifier().equals(identifier))
+        if (!this.identifier().equals(identifier))
             throw new IllegalArgumentException("Method's identifier did not equal the entry's identifier");
 
         this.methods.add(method);