Error with Nested Transactions

async function createOrGet<T>(
    parentTxn: DbTransaction<T>,
    entity: NewEntity,
): Promise<string | null> {
    try {
        return await parentTxn.transaction(async (childTxn) => {
            return await createInTxn(childTxn, entity)
        })
    } catch (e: unknown) {
        if (isDbErrorWithCode(e, PostgresErrorCode.UNIQUE_VIOLATION)) {
            return await findWorkflowTemplateByNameInTxn(parentTxn, entity.id)
        } else {
            return null
        }
    }
}

async function createOrGet<T>(
    parentTxn: DbTransaction<T>,
    entity: NewEntity,
): Promise<string | null> {
    try {
      return await createInTxn(parentTxn, entity)
    } catch (e: unknown) {
        if (isDbErrorWithCode(e, PostgresErrorCode.UNIQUE_VIOLATION)) {
            return await findWorkflowTemplateByNameInTxn(parentTxn, entity.id)
        } else {
            return null
        }
    }
}