Qt Linguist doesn't allow to edit translation

[mentalmushroom]

Hello. I use Qt Linguist to update translation. Today I noticed some entries in my .ts file are not editable.
translation_disabled.jpg
Does anybody know what causes this issue and how it can be fixed?

[wysota]

Hard to say just by this screenshot but it could be that the message string is deprecated.

[mentalmushroom]

I can try to provide additional information, but I don't know what else I can show here, so it helps to understand the issue. What does it mean "message string is deprecated"? What could be a reason for that in general? I solve the issue by editing the text in the code, then lupdate .ts files, it forces the translation to become incomplete and editable, but it appears to me strange why does it get disabled for any reason.

[wysota]

I can try to provide additional information, but I don't know what else I can show here

The ts file.

What does it mean "message string is deprecated"?

It means that it comes from an earlier version of the program and is no longer present in the current version.