phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '51fb87443eca20f8707b82f425c3bd48' 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 ('51fb87443eca20f8707b82f425c3bd48', -1, 1765644189, 1765644189, 'd849d850', 12, 0, 0)

Line : 187
File : sessions.php