This process is straightforward in Unity Entity Management. Here are the steps you need to follow:
Navigate to Securities > Ownership.
Click on the Holdings tab.
Use the search function to find the two entries for the holding you wish to combine.
Check the boxes on the left side to select them.
In the dropdown menu labeled 2 selected, choose the option to Combine.
A pop-up will appear, asking you to select the source shareholding to combine the duplicate records. Click on the applicable option to proceed with the Combine action.