[SOLVED] Index length is longer than the maximum error on 1.4

Error while creating index:

Index length is longer than the maximum: 768 (400)

index type: unique index name: unique_externalId attributes params: String, 1024 length, dart server sdk ver 8.0.0

works fine on 1.3.8

TL;DR

The user encountered an error message stating "Index length is longer than the maximum" when working with the dart server sdk version 8.0.0. They discovered that the maximum index length is 768, but couldn't find documentation explaining why. The issue was resolved by updating to version 1.3.8, which did not have this error.

found it there