phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('8c1736d56c4b5edf1bd9ac56ef07d1d2', -1, 1715342681, 1715342681, '12da7f8d', 7, 0, 0)

Line : 189
File : sessions.php