phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'c1d76b18329358f5fff0664b497f6817' 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 ('c1d76b18329358f5fff0664b497f6817', -1, 1770500248, 1770500248, '00000000', 30, 0, 0)

Line : 187
File : sessions.php