phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '763456b5c97f45b7f8448fe31477758a' for key 'phpbb_sessions.PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('763456b5c97f45b7f8448fe31477758a', -1, 1758057463, 1758057463, 'd849d863', -9, 0, 0)

Line : 187
File : sessions.php