You wont be able to edit shift in following situations:-

Shift is invoiced

You will not be able to edit shift, if client's invoice has been generated from that shift. Once invoice is generated, it blocks the shift from further changes. If for any reason you want to make changes, then you need to void invoice. This will open the shift for you to edit.

Shift is Cancelled

Cancelled shifts cannot be edited. In order to make changes in cancelled shift you have to rebook the shift.

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