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 ('6b75055dd6339d2ba1f9a281c328da05', -1, 1713482597, 1713482597, '030e8594', -7, 0, 0)

Line : 187
File : sessions.php