[FW][FIX] delivery: fix a recent fix and stop deleting invoiced order lines on update #74419
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Description of the issue/feature this PR addresses:
As of #72859 on every update of the delivery line in a sale order ALL pickings are overwritten with the new carrier, no matter what...
To save you guys from more OPWs and desperate customers, let me help you with two things and I hope it is appreciated.
Current behavior before PR:
Updating shipping costs do overwrite carriers of done and processed (tracking reference) pickings and also deleting sale order lines (delivery line) already invoiced.
Desired behavior after PR is merged:
Info: @wt-io-it
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Forward-Port-Of: #73624
Forward-Port-Of: #73187