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When changing the validity period, the following needs to be considered (logic is that your change of the validity period can never cause an existing time log entry no longer having a valid price list.):
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- Possible: 01.01.2012-31.12.2012, 01.03.2012-12.05.2012
- Not possible: 01.04.2012-30.06.2012, 01.03.2012-10.05.2012
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It is not possible to change rates, otherwise calculations would no longer be transparent. You have to be sure that all times logged have been priced with the rate of the price list applicable. If rates change, this can usually be reflected by setting up a new price list and modifying the validity of the old price list. |
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