phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'f8cc84619fa02d1e25e03e403e254918' 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 ('f8cc84619fa02d1e25e03e403e254918', -1, 1770442651, 1770442651, 'c0a8100b', -501, 0, 0)

Line : 187
File : sessions.php