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 ('4b3a93e0ba220e85914cf2422dc0a48f', -1, 1711626001, 1711626001, '03ee3909', -11, 0, 0)

Line : 187
File : sessions.php