phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('1641041f5b070e2865c11b2ea6896fdc', -1, 1713484144, 1713484144, '0395e948', -7, 0, 0)

Line : 187
File : sessions.php