On-disk-format of back-mdb depends on LDAP syntax?

HI!

Does the on-disk-format of back-mdb depends on which LDAP syntax is used for an attribute?

So if the LDAP syntax for an an existing attribute would change I have to reimport the MDB?

Background:

I've changed (as a work-around for a broken client software) the LDAP syntax of a custom attribute from Boolean to IA5String.

After that I could still read the attribute. But when deleting the attribute slapd returned noSuchAttribute(16). I had to remove the whole entry.

BTW: No index configured this attribute.

Ciao, Michael.