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We are Trying to Upgrade Odoo 9 CE to Odoo15 CE
For this we are Using Openupgrade scripts
Data is huge Data Ex: Account Move Lines 11 lacks
We have done Odoo 9 to Odoo 10 (Faster)
We have done Odoo 10 to Odoo 11 (Little bit time consuming)
We have done Odoo 11 to Odoo 12 (Faster)
We have done Odoo 12 to Odoo 13 (Accounting scripting are taking too long time, 3 to 4 hours)

The time consumption due to huge data? or any other Issue?

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Hi,

The time consumption during the upgrade process could be due to a variety of factors, including the amount of data being migrated, the complexity of the data model, the hardware resources available, and any customizations or third-party modules that need to be updated or migrated. For this case from v12-v13 there is drastic change in the odoo accounting module. Such that the migration scripts running time may increase.

Regards

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