fix: incorrect created date shown on backup method #548

Job	Run time
CI / Context	1s
CI / Generate matrix	12s
CI / Check governance	0s
CI / 8.1 prf-low mysql57 phpunit all	2m 2s
CI / 8.2 mariadb phpunit all	2m 15s
CI / 8.3 mysql80 phpunit all	2m 31s
CI / 8.1 mysql57 phplinting	1m 51s
CI / 8.1 mysql57 endtoend root	2m 52s
CI / 8.3 mysql80 endtoend root	2m 29s
CI / 8.1 mysql57 js	4m 11s
CI / 8.1 mysql57 doclinting	2m 14s
CI / Dispatch tag patch release	0s
	20m 38s

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