When you need to edit or remove data entry, there are  few items that might not be available to edit or remove:

That happens usually because that data entry is not the last data entered in that sow or group.

On that case,  you can check by accessing a sow card or  a group card, by going to history and check if that data was the last entry.

For instance, the sow 99123 you can see a weaning and  later with mating

Therefore, in order to edit the weaning date, you would have to go through the following steps:

1 - Remove the mating


2 - Edit the date of the weaning or any other data you need to adjust

3 - Add the mating back

Then, you can check if the sow card has been updated