Today if we detect concurrent modification of a snapshot repository then we mark it with `CORRUPTED_REPO_GEN` which blocks further writes to try and prevent additional damage to its contents. You can remove the marker by calling the register-repository API again, but this API will discard no-op re-registrations without taking any action. You can work around this by unregistering the repository first (which may be impossible if it's still in use for searchable snapshots) or by re-registering it with some trivial setting change (which seems hacky).

We should not consider it a no-op re-registration if the repository is currently marked with `CORRUPTED_REPO_GEN`, because doing this re-registration will re-read the repo contents and clear the corruption marker and therefore is not a no-op.
server/src/main/java/org/elasticsearch/repositories/RepositoriesService.java
logger.debug("closing repository [{}][{}]", repository.getMetadata().type(), repository.getMetadata().name());
        repository.close();
    }
    private void archiveRepositoryStats(Repository repository, long clusterStateVersion) {
        if (repository instanceof MeteredBlobStoreRepository) {
            RepositoryStatsSnapshot stats = ((MeteredBlobStoreRepository) repository).statsSnapshotForArchival(clusterStateVersion);
            if (repositoriesStatsArchive.archive(stats) == false) {
                logger.warn("Unable to archive the repository stats [{}] as the archive is full.", stats);
            }
        }
    }
    /**
     * Creates repository holder. This method starts the repository
     */
    private static Repository createRepository(
        RepositoryMetadata repositoryMetadata,
        Map<String, Repository.Factory> factories,
        Function<RepositoryMetadata, Repository> defaultFactory
    ) {
        logger.debug("creating repository [{}][{}]", repositoryMetadata.type(), repositoryMetadata.name());
        Repository.Factory factory = factories.get(repositoryMetadata.type());
        if (factory == null) {
            return defaultFactory.apply(repositoryMetadata);
        }
        Repository repository = null;
        try {
            repository = factory.create(repositoryMetadata, factories::get);
            repository.start();
            return repository;
        } catch (Exception e) {