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 ('8f5048d5f0e1f43b3a26e5330d0b19d5', -1, 1714758383, 1714758383, '12df7cf4', 7, 0, 0)

Line : 187
File : sessions.php