Cant edit Group Id with string instead of int

[rcx986635]

Provide environment information

python 3.7 labelme 4.5.6

What OS are you using?

windows 10

Describe the Bug

Cant edit Group Id with string instead of int:
I want to give the polygon some descriptions ,so one solution is putting description in the Group ID at the right box, But I cant put any not-int char in the Group-ID-box ， If anyone konws how should I change something or any other solution? Thanks a lot

Expected Behavior

No response

To Reproduce

No response