Warnings in console

hi,

i see a lot of warnings in mendix console. e.g.: "Object with id '[MendixIdentifier:: id=30680772461465911 objectType=<xxxModule>.<yyyEntityName> entityID=109]' could not be retrieved."

What are these? how can i avoid these? seems like i am trying to retrieve something over association which is not present and i am doing action on them. which is flagged by mendix.

is this correct? but in other mfs where REALLY data may not be present and actions on them doesnt lead to this warnings.

Any clues? can i ignore these or shall i be worried?