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 ('245219106e8d68d1f991df0822b97dbc', -1, 1713903710, 1713903710, '1275b796', -7, 0, 0)

Line : 187
File : sessions.php