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 ('8d3a81407bb2ee82878eb483a7e21d64', -1, 1713472346, 1713472346, '1274086e', -11, 0, 0)

Line : 187
File : sessions.php