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 ('f370b3d6c4dbf799199a3bc8e604f1b0', -1, 1526975174, 1526975174, '36c45659', -7, 0, 0)

Line : 187
File : sessions.php