Convert Lead to Contact Error

Hello,

If i want convert lead to contact, i have an error :

Warning: Undefined array key "imagename" in /home/admin/web/XXXXx.XXXX.fr/public_html/include/Webservices/ConvertLead.php on line 55

Warning: Undefined array key "Accounts" in /home/admin/web/XXXX.XXXX.fr/public_html/include/Webservices/ConvertLead.php on line 63

Warning: Trying to access array offset on value of type null in /home/admin/web/XXXXx.XXXX.fr/public_html/include/Webservices/ConvertLead.php on line 63

Warning: Undefined array key "Accounts" in /home/admin/web/XXXX.XXXX.fr/public_html/include/Webservices/ConvertLead.php on line 79

Warning: Trying to access array offset on value of type null in /home/admin/web/XXXX.XXXXX.fr/public_html/include/Webservices/ConvertLead.php on line 79

Warning: Undefined array key "Potentials" in /home/admin/web/XXXX.XXXXX.fr/public_html/include/Webservices/ConvertLead.php on line 79

Warning: Trying to access array offset on value of type null in /home/admin/web/XXX.XXXX.fr/public_html/include/Webservices/ConvertLead.php on line 79

Warning: Undefined array key "Accounts" in /home/admin/web/XXXX.XXXX.fr/public_html/include/Webservices/ConvertLead.php on line 148
Prospect ne peut être converti
Voici les raisons possibles:
Tous les champs obligatoires ne sont pas mappés
Certains champs obligatoires sont vides

Warning: Undefined array key "EXCEPTION" in /home/admin/web/XXXX.XXXX.fr/public_html/test/templates_c/v7/30f2aacef8f92a0ffb1f27a374899a9fba0f1917_0.file.ConvertLeadError.tpl.php on line 33

Warning: Attempt to read property "value" on null in /home/admin/web/XXX.XXXX.fr/public_html/test/templates_c/v7/30f2aacef8f92a0ffb1f27a374899a9fba0f1917_0.file.ConvertLeadError.tpl.php on line 33

When i edit the mapping i don't see a field assigner_to_user but i have this field in my Mysql table...

Thank's for your help !