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 ('266d6e7eb1435f2e9d7d1d7bf8d34999', -1, 1711651256, 1711651256, '365711b1', -11, 0, 0)

Line : 187
File : sessions.php