Opensearch serverless maximum number of index templates

As per this doc the maximum number of indices for a search collection is 800. May I know what is the maximum number of index templates we can create on aoss? I am getting the following error when tried to create above 500 index templates. {"error":{"root_cause":[{"type":"validation_exception","reason":"Validation Failed: 1: this action would add [1] COMPOSABLE_TEMPLATE, but this collection currently has [500]/[500] COMPOSABLE_TEMPLATE;"}],"type":"validation_exception","reason":"Validation Failed: 1: this action would add [1] COMPOSABLE_TEMPLATE, but this collection currently has [500]/[500] COMPOSABLE_TEMPLATE;"},"status":400}