Can't reset birthday reminder after migration in thunderbird

[Micha-Btz]

@teneco @aestheticus
did you have also two calendar entry’s like me?

Contacts birthday are shown double in calendar

my old contacts with included birthday are shown twice in calendar. the new created contacts are shown right. problem: [image] new created user: [image] shown right: [image] i have always two calendar events on the phone some idea to solve this. TIA Micha