Impossible to import users using LDAP

Hello
I have a strange behavior when I import certain ldap users
I get a blank Contacts/Users page

I enabled ldap debug, and on centreon-error.log, there is this error every time I try to import an user

PHP Fatal error:  Uncaught PDOException: SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails (`centreon`.`contactgroup_contact_relation`, CONSTRAINT `contactgroup_contact_relation_ibfk_1` FOREIGN KEY (`contact_contact_id`) REFERENCES `contact` (`contact_id`) ON DELETE CASCADE) in /usr/share/centreon/www/class/centreonDB.class.php:274
Stack trace:
#0 /usr/share/centreon/www/include/configuration/configObject/contact/DB-Func.php(1277): CentreonDB->query('INSERT INTO con...')
#1 /usr/share/centreon/www/include/configuration/configObject/contact/ldapImportContact.php(134): insertLdapContactInDB(Array)
#2 /usr/share/centreon/www/include/configuration/configObject/contact/contact.php(168): require_once('/usr/share/cent...')
#3 /usr/share/centreon/www/main.get.php(257): include_once('/usr/share/cent...')
#4 {main}
  thrown in /usr/share/centreon/www/class/centreonDB.class.php on line 274

I checked those tables where it say there is constraint violation, and I did not find any violation

the user that I try to add, had been deleted, and I tried to add them again

I’m using ActiveDirectory

Centreon version 20.10

Thank you