Score corruption after converting dotted half-note

Issue type

File corruption

Description with steps to reproduce

MuseScore 4.6:
1: load the attached score
2: In the trumpet part select the terminating dotted half-note (bar 78)
3: convert the dotted half-note (bar 78) to a half-note plus quarter note by clicking on the "dotted note" tool button
4: attempt to save the file. A popup dialog tells me that bar 78 is now corrupt: "Incomplete measure: Part score: Trompette en Si♭, measure 78, staff 1. Found: 10/8. Expected: 4/4."

Supporting files, videos and screenshots

MuseScore4.6-corruption-example.mscz.zip

In which versions of MuseScore Studio is this issue present?

4.6

Regression

No.

Operating system

Windows 10

Checklist

• This report follows the guidelines for reporting bugs and issues
• I have verified that this issue has not been logged before, by searching the issue tracker for similar issues
• I have attached all requested files and information to this report
• I have attempted to identify the root problem as concisely as possible, and have used minimal reproducible examples where possible