When MBEDTLS_PSA_INJECT_ENTROPY is enabled, the entropy file (0xffffff52, symbolic name PSA_CRYPTO_ITS_RANDOM_SEED_UID) is part of the backward compatibility promise of Mbed TLS: if you upgrade the library on a device which has a seed file, the next version of the library must recognize this seed file (otherwise the device is likely bricked).

The goal of this issue is to make sure that if the library can't read an existing seedfile, this will cause a test failure.