fix aliased model logic - again

Author: BSnelling

petab/v2/lint.py

@@ -1055,11 +1055,15 @@ def get_valid_parameters_for_parameter_table(
     #       aliases an invalid PEtab ID? See
     #       https://github.com/PEtab-dev/libpetab-python/pull/482#discussion_r3420762034
     for mapping in problem.mappings:
-        if mapping.model_id and mapping.model_id in parameter_ids.keys():
+        if mapping.petab_id not in invalid:
             parameter_ids[mapping.petab_id] = None
-            # An aliased model id is not a valid parameter id
-            if mapping.model_id in parameter_ids:
-                del parameter_ids[mapping.model_id]
+        # An aliased model id is not a valid parameter id
+        if (
+            mapping.model_id
+            and mapping.model_id != mapping.petab_id
+            and mapping.model_id in parameter_ids
+        ):
+            del parameter_ids[mapping.model_id]
 
     # add output parameters from observable table
     output_parameters = problem.get_output_parameters()