phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'ffd1a4b6a62bc31732e1eeb54061ab88' 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 ('ffd1a4b6a62bc31732e1eeb54061ab88', -1, 1763801198, 1763801198, 'd849d863', -4, 0, 0)

Line : 187
File : sessions.php