phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '787557fb9e5e12ab7cb5ab0c03d33456' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('787557fb9e5e12ab7cb5ab0c03d33456', -1, 1766199836, 1766199836, 'd849d883', 4, 0, 0)

Line : 187
File : sessions.php