[TECH SUPPORT] LPS-39026 LAR import fails in "Copy As New" mode if there are referenced DL files in web contents

Hi Dániel,

the first commit of the original pull request from @giros is not necessary anymore.

I don't know how this fix fits the new staging logic, however, I couldn't find a similar pattern which we could follow completely.

I'm not sure in rules for putting a try...catch block in an other one with catching the same exception.

Regards,
Zsigmond