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 ('87743a11b4396d3dee01bcd1a00aa13b', -1, 1711623990, 1711623990, '03597498', -7, 0, 0)

Line : 187
File : sessions.php