phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1114 The table 'phpbb_sessions' is full

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('c7fec788d1a2475b2d74d0fe87fdaa0e', -1, 1511367213, 1511367213, '36c40283', -2, 0, 0)

Line : 211
File : sessions.php