phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '797a880a6890e3ddfbcc4e884c83e2d1' 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 ('797a880a6890e3ddfbcc4e884c83e2d1', -1, 1563230733, 1563230733, '36d38720', -9, 0, 0)

Line : 198
File : sessions.php