Switching StoredId connector from base64 to base32 encoding

[Etienne Dysli Metref]

Hi there!

We're currently running the following DataConnector for persistentIDs
and we'd like to switch to base32 encoding to support pairwise-id.

<DataConnector id="myStoredId" xsi:type="StoredId"
    generatedAttributeID="persistentID"
    salt="%{idp.persistentId.salt}"
    encoding="BASE64">
    <InputAttributeDefinition ref="%{idp.persistentId.sourceAttribute}" />

<BeanManagedConnection>shibboleth.PostgreSQLDataSource</BeanManagedConnection>
</DataConnector>

What explodes if we just change the encoding attribute to "BASE32"?
Will it take effect only for newly-generated values where no
persistentID exists, or will it try to rewrite old persistentIDs in the
database with the new encoding?

Cheers,
  Etienne

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