Exporting BPM to tags - solved

Sometimes the BPMeter of mixxx isn’t correct.
In the library view, i edit the BPM to the correct.
But how to export to tags the BPM ?
If i export to tags with right click, the BPM tag not up to date.
I use mixxx 2.2.4


Export to File Tags: Saves metadata to files. Mixxx may wait to modify files until they are not loaded to any decks or samplers. If you do not see changed metadata in other programs immediately, eject the track from all decks and samplers or shutdown Mixxx.

This also applies when enabling the corresponding preference setting permanently.

Okay good, after removing from all deks not work. Only when mixxx closed metadata updated
Very strange comportment