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 ('c71faaf4f791dd33bbf9616a1a0f5baa', -1, 1519005230, 1519005230, '36e36835', -11, 0, 0)

Line : 187
File : sessions.php