The subject matter of the independent claim should be consistent with the subject matter of the utility model name in the request, and does not need to be word for word.
For example: the name of the utility model in the request is "a coupling", but the name in the claim is "a coupling with bearings"; or the name in the claim is " "A coupling", while the name of the utility model in the application is "A coupling with bearings". In these two cases, the subject matter "coupling" is the same, which means that the subject matter is the same.
The above comes from the "Examination Operating Procedures (Utility Model Volume)". Solution: Just change the theme to be consistent.