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 ('c69e270f0f19ba5851f02a2b7e9d1b8b', -1, 1713921875, 1713921875, '039061bd', -11, 0, 0)

Line : 187
File : sessions.php