importing of calculated item with random custom formula can result in error

1. Create an older version of import with calculated item.
2. Add formula in the field:

max(1)

3. Export and import into 5.4
Result error:

Invalid parameter "/16/params": mandatory parameter is missing in function "max".

Issue was found during ZBX-19815 and needs to be looked at. Possible that the syntax is not supported before and was allowed due to improper validation or import converter is not properly converting the field.