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 ('31e66af1372e88780a6e64d2b6c25ce1', -1, 1714041894, 1714041894, '12e318d1', -10, 0, 0)

Line : 187
File : sessions.php