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 ('f84a7bf5b00b7ac4addddcb6fd5f415b', -1, 1542781676, 1542781676, '36ea0daf', 22, 0, 0)

Line : 186
File : sessions.php