phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : -1 ERROR: duplicate key value violates unique constraint "phpbb_session_pkey" DETAIL: Key (session_id)=(647001a44003c8cc25f17d780617e49c) already exists.

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('647001a44003c8cc25f17d780617e49c', -1, 1621191547, 1621191547, '03500683', -4, 0, 0)

Line : 187
File : sessions.php