phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '31957ef330f9007815214ad93377c351' 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 ('31957ef330f9007815214ad93377c351', -1, 1772183345, 1772183345, 'd849d871', -4, 0, 0)

Line : 187
File : sessions.php