A package has to be updated, but it can't be unsealed, the following error is received while trying to do so:
Software is distributed/delivered and is not allowed to be unsealed. [SDM001081]
How can the package be updated?
CA Client Automation - All Versions
When a package is just registered it can be unsealed but when it has been staged on Scalability Server libraries or deployed to Agents, the packages can not be modified.
The reason behind this behavior is because modifying a package on the Domain Manager using the same version but with different files will create confusion on which files/options have been used on each installation using the same name/version of the package.
Depending on the activity related to the package you can proceed as follows: