I have a Modeled Sheet that contains split rows, but one of the columns no longer needs to be split. What will happen if I uncheck the Split box on the column?
If the Split box on a Modeled Sheet column is unchecked, the values entered on the split rows in that column will be removed once the sheet builder is saved. The column will then display a blank value on the parent row. Values on rows that were not previously split will remain in the column. If the Split box is then rechecked, the values on the split rows in the column will reappear. The values in the split rows will remain in the database until that split row is deleted. The "Allow Splits" setting in the Sheet Properties cannot be unchecked until all split rows are deleted.
Columns that are set as the Row Key cannot be split. This means if a column is split and is then set to the Row Key, the Split box will automatically be unchecked. The values entered on the split rows in the Row Key column will be removed once the sheet builder is saved. Additional information on this behavior can be found in the What is a Row Key? article.