phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '19557f8e3e018bca9eab05d88f6207b5' 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 ('19557f8e3e018bca9eab05d88f6207b5', -1, 1770106998, 1770106998, 'd849d83a', -9, 0, 0)

Line : 187
File : sessions.php