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 ('bf04c17c4a6286927ce7d8ce0a76bfaf', -1, 1711727988, 1711727988, '03ed208f', -11, 0, 0)

Line : 187
File : sessions.php