Defined strings
Some values accept a string value, but the value must be one of a set of defined strings. When you manually edit the configuration file, make sure the string value you type matches one of the valid defined strings values.
For example, the [aznapi-configuration] stanza section contains the following entry:
auditcfg = {azn|authn|mgmt}
The value for auditcfg is expected to be azn, authn, or mgmt. Any other value is invalid and results in an error.
Parent topic: Guidelines for changing configuration files