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However, it would require table extensions with both the source fields and destination fields being installed at the same time. This would not be a problem for the Logtrade and ShipIT 365 connectors, but we want to make the migration as easy as possible for custom extensions by only requiring our partners do a simple Search and Replace as described in the the How-to: Migration of Pack & Ship. It would therefor not be possible access both source and destination fields from custom table extensions at the same time.