phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '4cb78f6569ac48bb4030c8a7fcd7a8d1' 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 ('4cb78f6569ac48bb4030c8a7fcd7a8d1', -1, 1767200671, 1767200671, 'c0a8100c', -2, 0, 0)

Line : 187
File : sessions.php