[GNC] flatpak 4.4 reports anomaly

[Elmar]

Running the flatpak 4.4 on Linux Mint 19.3 - I've copied my version 
2.6.19 reports into the gnucash folder in 
/home/ets/.var/app/org.gnucash.GnuCash/data/gnucash (saved reports 
2.4).  They al show up and run fine, BUT as soon as I try to delete one 
of them, I get a CTD, a locked data file, and when I start the programk 
(open anyway) and reopen the reports menu, only 2 of the many reports I 
have saved show up.  Is ther a fundamental incompatability with the 
report?  I can get my reports back if I delete the file 
/home/ets/.var/app/org.gnucash.GnuCash/data/gnucash/saved-reports-2.8 
and they do run, but I cannot delete any of them, and trying to export 
their output results in the same crash.  Do I have to recreate ALL my 
reports in the new version of GC?