Duplicate entry in oc_cards_properties

Dear all,
we are using nextcloud 22.2.3 on centos 7 (php 7.4.26). The system works fine but we have duplicate entries for some users (only the same 5 users also after deleted from oc_cards_properties table).
As I explained before, we deleted the entries from the oc_cards_properties and for a while the problem seems solved but the same problem for the same users appear again in few time.
Any suggestions? Thanks in advance.