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 ('9b3a6b53f04b2a24b0a2646f1418b7b9', -1, 1529850879, 1529850879, '36e11fbc', 15, 0, 0)

Line : 187
File : sessions.php