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 ('205f2a1b8475d68b0c0fb18f35a82ae1', -1, 1526878684, 1526878684, '369f55c1', 18, 0, 0)

Line : 187
File : sessions.php