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 ('37897f3ba2c6ec36ad686cd2b29fadfe', -1, 1714624002, 1714624002, '030fbe90', -55, 0, 0)

Line : 187
File : sessions.php