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 ('9c3a33be6c454087a8e6b51dcbf2bd75', -1, 1714039707, 1714039707, '340ef0b2', -4, 0, 0)

Line : 187
File : sessions.php