Attribute &1: Format &2 is invalid for attribute value

What causes this issue?

Possible causes:
Intervals can only be specified if you have set the indicator <LS>
Intervals Allowed</>.
You must specify the interval in the form value 1 - value 2 (there must
be a space both before and after the hyphen). No other character except
a hyphen may be used to separate the values.
A value can contain up to the same number of decimal places as specified
in the <LS>Decimal Places</> field.
The value in the field <LS>Number of Chars</> defines the total number
of characters, including decimal places (for example: If the number of
characters = 3, and the number of decimal places = 1, then 20.1 is
valid, but 300.1 is not valid).
You must define the decimal point and the thousand separator according
to your user settings.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

How to fix this error?

Use the value help, if available, to select a permitted value. If there
is no value help available, check the data type of the marketing
attribute.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.