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 ('799f073eb9c1dd64b4fbe0d0e1d3b516', -1, 1524185580, 1524185580, '36c64e79', 15, 0, 0)

Line : 187
File : sessions.php