Empower3 asing different post run for the same column


We have Agilent 7890A and 7697A which work with Empower3.

We have created the same instrument method, with the same temperature ramp and the same column properties in different projects. Although we haven't stablished any post run in the oven temperature program, it appears a post run value in the column which we cannot modify, but this value is not the same in both instruments. What can be the reason  of this different value?

Thank you in advance.

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