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AI generated answer (using internal Slack threads):

Based on the conversations, it seems that you can handle historical intercompany migration by creating adjacent accounts that can store GL movements without a customer or vendor and load all the historic movements to that. Then, in the period before go live, journal them out to the P&L and create the proper transactions hitting the P&L account. Anything left over in that account gets coded to unrealised gain/loss, then you re-run your revals which should get you back to the correct opening balance in your balance sheet. For your specific case of reclassifying a non-interco technical account to an interco account, you can use either a standard intercompany journal entry or an advanced intercompany journal entry. The choice between the two depends on the complexity of your intercompany transactions and the level of detail you need to maintain. Here's a simplified example of how you might do this: 1. Start with your opening balance in the non-interco technical account. Let's say it's $1000. 2. Create a standard intercompany journal entry to debit the interco account and credit the non-interco technical account for the same amount. For example:

Debit Interco Account: $1000
Credit Non-Interco Technical Account: $1000

3. This will effectively move the balance from the non-interco technical account to the interco account. Remember, this is a simplified example and the actual process may involve more steps depending on your specific situation. ****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ******