Assuming that you are creating a new Living Trust with the intent of replacing your existing one (i.e., you are not creating a second trust funded with assets not covered previously), the new Trust documents would supersede and take precedence over the existing documents.
Typically, a new trust would be created when substantial changes to the funding, content or distribution of assets is desired. (Minor changes should simply be made to existing documents.)
Remember, it is important to notify any and all banks, mortgage companies, etc. referenced in the existing trust that you are creating a new trust and revoking the prior one, so that there are no questions later. You should also consider notifying beneficiaries and any other persons referenced in the revoked document as well.
[Get complete details on Standard Legal’s Living Trust legal forms software here.]