phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '4782e8c287be835a797bca4aa192c59c' 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 ('4782e8c287be835a797bca4aa192c59c', -1, 1771899390, 1771899390, '7f000001', -9, 0, 0)

Line : 187
File : sessions.php