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 ('66e00dd2248d4303ba99da4ef49a78d5', -1, 1713964024, 1713964024, '127783b2', -9, 0, 0)

Line : 187
File : sessions.php