nextcloud contacts are duplicating

[Uturn]

with KDE plasma mobile, i happened to add the same nextcloud account twice. So, my address book showed every contact twice. Now I deleted one of these identical nextcloud accounts. The duplicated contacts remained. Next I deleted my other nextcloud account.
Zero account left, but all contacts remained twice in phone book app. After a restart, I added my Nextcloud accoung again: Now I have three copies of each contact.

Sync with nextcloud does not seem to work as it should.

How can I clear the local contacts data so phone book is empty again?
So I could set my cloud syncing from scratch?
Is it maybe better to set up vdirsyncer for cloud syncing?

[user641]

with KDE plasma mobile, i happened to add the same nextcloud account twice. So, my address book showed every contact twice. Now I deleted one of these identical nextcloud accounts. The duplicated contacts remained. Next I deleted my other nextcloud account.
Zero account left, but all contacts remained twice in phone book app. After a restart, I added my Nextcloud accoung again: Now I have three copies of each contact.

Sync with nextcloud does not seem to work as it should.

How can I clear the local contacts data so phone book is empty again?
So I could set my cloud syncing from scratch?
Is it maybe better to set up vdirsyncer for cloud syncing?

Maybe the easiest way is to delete the contacs file in .local .config and .cache, you can delete also the folder os nextcloud there and setup everything again.