NullPointerException accessing entity by ID when #CreatedBy auditing is used - spring-data-jpa

Question

I just added a relation with #CreatedBy to one of my entites and since then, I receive a NullPointerException accessing it via ID. But first things first:
The entity. I am leaving out some fields but left the "owner" in place, since the stack trace (see below) refers to that. The "creator" is the relation I added.
#Entity
#Data
#NoArgsConstructor
#EntityListeners(AuditingEntityListener.class)
public class Invitation implements BaseEntity<Long>, OwnedEntity {
#Id
#GeneratedValue
private Long id;
#NotNull
#ManyToOne
private Company owner;
#CreatedBy
#OneToOne
private Account creator;
...
}
The "creator" field is set by my implementation of AuditorAware which looks like this:
#Component
#RequiredArgsConstructor(onConstructor = #__(#Autowired))
public class AuditorProvider implements AuditorAware<Account> {
private static final Log LOG = LogFactory.getLog(AuditorProvider.class);
private final #NonNull AccountRepo accountRepo;
#Override
public Optional<Account> getCurrentAuditor() {
Optional<Account> opt = accountRepo.findMe();
if (opt.isPresent()) {
LOG.debug("Found auditor: " + opt.get());
} else {
LOG.debug("No auditor found.");
}
return opt;
}
}
The method accountRepo.findMe() finds the current instance of Account based on the security context.
With this in place, when I POST an Invitation entity like
curl -XPOST -H "Authorization: Bearer $TOKEN" -H "Content-type: application/hal+json" localhost:8081/invitations -d '{"email":"k#lo.de","role":"http://localhost:8081/roles/139"}'
the response body looks good:
{
"email" : "k#lo.de",
"_links" : {
"self" : {
"href" : "http://localhost:8081/invitations/144"
},
"invitation" : {
"href" : "http://localhost:8081/invitations/144"
},
"creator" : {
"href" : "http://localhost:8081/invitations/144/creator"
},
"role" : {
"href" : "http://localhost:8081/invitations/144/role"
},
"owner" : {
"href" : "http://localhost:8081/invitations/144/owner"
}
}
}
The database table for Invitations and the logs show that the "creator" has successfully been set.
Fetching all invitations works perfectly fine without any errors:
curl -v -H "Authorization: Bearer $TOKEN" -H "Content-type: application/hal+json" http://localhost:8081/invitations
Fetching that Invitation with ID 144 gives me an HTTP 500 error:
curl -v -H "Authorization: Bearer $TOKEN" -H "Content-type: application/hal+json" http://localhost:8081/invitations/144
Looking into the logs, I see this stack trace: https://pastebin.com/mVzHHddU
The reason I left the "owner" relation in the snippet above is this line:
at training.edit.identity.model.Company.hashCode(Company.java:22) ~[classes/:na]
Other than that, none of the lines are familiar to me and I cannot make any sense out of the error.
Any ideas would be highly appreciated!
Edit: The company entity
#Data
#NoArgsConstructor
#Entity
public class Company implements BaseEntity<Long>, OwnedEntity {
#Id
#GeneratedValue
private Long id;
#NotNull
private String name;
#NotNull
#OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER, orphanRemoval = true)
private Set<Address> addresses = new HashSet<Address>();
public boolean addAddress(Address address) {
return this.addresses.add(address);
}
#JsonIgnore
#Override
public ScopedEntity getParent() {
return null;
}
#JsonIgnore
#Override
public Set<Company> getTenants() {
return Sets.newHashSet(this);
}
#Override
public void configureTenant(Company tenant) {
throw new RuntimeException("Cannot configure tenant on Company.");
}
}
Edit: Because of the lombok related comment below, I removed the #Data annotation from Company and created the getters and setters manually. Like this, fetching an Invitation by ID works.
Does that make sense to anyone?