open general ledger setup

change global dimension

select a new dimension

Click "start"

Comprehensive Detailed Explanation

In Dynamics 365 Business Central, Global Dimensions are critical because they are applied across the system in posted entries, G/L entries, and reports. If they are set incorrectly, you can use the Change Global Dimensions function.

Since the database contains very few posted entries, we can use Sequential mode (faster and suitable for small databases). The correct steps are:

Open General Ledger Setup → Navigate to General Ledger Setup, which contains the Global Dimension fields.

Select the Change Global Dimensions action → This opens the dedicated page to change dimensions.

Select the new dimension → Choose which dimension you want to replace Global Dimension 1 with.

Select the Start action → Starts the sequential process to update entries and data tables.

⚠️ The actions Prepare and Sign out and back in are used for Parallel mode (suitable for larger datasets), where data preparation and session reset are required. For Sequential mode, those are not necessary.

Microsoft Learn References:

Change Global Dimensions in Business Central

General Ledger Setup