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 ('90c5b5d19dcdc2ff9a0330fb8c987e63', -1, 1542779971, 1542779971, '36ea0daf', -4, 0, 0)

Line : 186
File : sessions.php