TCPDF error: Missing or incorrect image file: /tmp/jpgIksa7cA fatal MySQL error occured.

Query:
REPLACE INTO pmd_v1_sessions VALUES ('bdf8588d219c02673a39a0ed62b052b4','initiated|b:1;',1498481326,'94082a50c352b78159112f3c522b5d0d')

Error:
(1062) Duplicate entry '1498481326' for key 'expiry'