phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '9173dbbc1d98c499620649b1adbcbcf7' 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 ('9173dbbc1d98c499620649b1adbcbcf7', -1, 1767735655, 1767735655, 'd849d868', -4, 0, 0)

Line : 187
File : sessions.php