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 ('4288654d2552756b21a741191bc9f071', -1, 1742110154, 1742110154, 'a28000000', 9, 0, 0)

Line : 187
File : sessions.php