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 ('bc6014a8f74d82e72ef479ff1c963166', -1, 1714026589, 1714026589, '12bfef7b', -7, 0, 0)

Line : 187
File : sessions.php