Capitalization issue?

Received a stack trace of this exception:
OTHER: failed for MessageType : MODIFY_REQUEST
Message ID : 2100
Modify Request
Object : 'cn=TURÁN Ľudovít,ou=zimbra,ou=people,dc=leier'
Modification[0]
Operation : add
Modification
employeeType: seafileorg.apache.directory.api.ldap.model.message.ModifyRequestImpl@63837e55: 317:
java.lang.ArrayIndexOutOfBoundsException: 317
at org.apache.directory.api.util.Strings.toLowerCaseAscii(Strings.java:1872)
at org.apache.directory.server.ldap.replication.provider.SyncReplSearchListener.isConfigEntry(SyncReplSearchListener.java:547)
at org.apache.directory.server.ldap.replication.provider.SyncReplSearchListener.entryModified(SyncReplSearchListener.java:306)
at org.apache.directory.server.core.event.EventInterceptor.fire(EventInterceptor.java:165)
at org.apache.directory.server.core.event.EventInterceptor.modify(EventInterceptor.java:320)
at org.apache.directory.server.core.api.interceptor.BaseInterceptor.next(BaseInterceptor.java:506)
at org.apache.directory.server.core.subtree.SubentryInterceptor.modify(SubentryInterceptor.java:1220)
at org.apache.directory.server.core.api.interceptor.BaseInterceptor.next(BaseInterceptor.java:506)
at org.apache.directory.server.core.collective.CollectiveAttributeInterceptor.modify(CollectiveAttributeInterceptor.java:165)
at org.apache.directory.server.core.api.interceptor.BaseInterceptor.next(BaseInterceptor.java:506)
at org.apache.directory.server.core.operational.OperationalAttributeInterceptor.modify(OperationalAttributeInterceptor.java:449)
at org.apache.directory.server.core.api.interceptor.BaseInterceptor.next(BaseInterceptor.java:506)
at org.apache.directory.server.core.schema.SchemaInterceptor.modify(SchemaInterceptor.java:1206)
at org.apache.directory.server.core.api.interceptor.BaseInterceptor.next(BaseInterceptor.java:506)
at org.apache.directory.server.core.hash.ConfigurableHashingInterceptor.modify(ConfigurableHashingInterceptor.java:185)
at org.apache.directory.server.core.api.interceptor.BaseInterceptor.next(BaseInterceptor.java:506)
at org.apache.directory.server.core.kerberos.KeyDerivationInterceptor.modify(KeyDerivationInterceptor.java:212)
at org.apache.directory.server.core.api.interceptor.BaseInterceptor.next(BaseInterceptor.java:506)
at org.apache.directory.server.core.exception.ExceptionInterceptor.modify(ExceptionInterceptor.java:252)
at org.apache.directory.server.core.api.interceptor.BaseInterceptor.next(BaseInterceptor.java:506)
at org.apache.directory.server.core.admin.AdministrativePointInterceptor.modify(AdministrativePointInterceptor.java:1453)
at org.apache.directory.server.core.api.interceptor.BaseInterceptor.next(BaseInterceptor.java:506)
at org.apache.directory.server.core.authz.DefaultAuthorizationInterceptor.modify(DefaultAuthorizationInterceptor.java:263)
at org.apache.directory.server.core.api.interceptor.BaseInterceptor.next(BaseInterceptor.java:506)
at org.apache.directory.server.core.authz.AciAuthorizationInterceptor.modify(AciAuthorizationInterceptor.java:814)
at org.apache.directory.server.core.api.interceptor.BaseInterceptor.next(BaseInterceptor.java:506)
at org.apache.directory.server.core.referral.ReferralInterceptor.modify(ReferralInterceptor.java:317)
at org.apache.directory.server.core.api.interceptor.BaseInterceptor.next(BaseInterceptor.java:506)
at org.apache.directory.server.core.authn.AuthenticationInterceptor.processPasswordPolicydModify(AuthenticationInterceptor.java:931)
at org.apache.directory.server.core.authn.AuthenticationInterceptor.modify(AuthenticationInterceptor.java:890)
at org.apache.directory.server.core.api.interceptor.BaseInterceptor.next(BaseInterceptor.java:506)
at org.apache.directory.server.core.normalization.NormalizationInterceptor.modify(NormalizationInterceptor.java:216)
at org.apache.directory.server.core.DefaultOperationManager.modify(DefaultOperationManager.java:886)
at org.apache.directory.server.core.shared.DefaultCoreSession.modify(DefaultCoreSession.java:975)
at org.apache.directory.server.core.shared.DefaultCoreSession.modify(DefaultCoreSession.java:958)
at org.apache.directory.server.ldap.handlers.request.ModifyRequestHandler.handle(ModifyRequestHandler.java:56)
at org.apache.directory.server.ldap.handlers.request.ModifyRequestHandler.handle(ModifyRequestHandler.java:39)
at org.apache.directory.server.ldap.handlers.LdapRequestHandler.handleMessage(LdapRequestHandler.java:207)
at org.apache.directory.server.ldap.handlers.LdapRequestHandler.handleMessage(LdapRequestHandler.java:56)
at org.apache.mina.handler.demux.DemuxingIoHandler.messageReceived(DemuxingIoHandler.java:243)
at org.apache.directory.server.ldap.LdapProtocolHandler.messageReceived(LdapProtocolHandler.java:216)
at org.apache.mina.core.filterchain.DefaultIoFilterChain$TailFilter.messageReceived(DefaultIoFilterChain.java:858)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:542)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1300(DefaultIoFilterChain.java:48)
at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:947)
at org.apache.mina.core.filterchain.IoFilterEvent.fire(IoFilterEvent.java:74)
at org.apache.mina.core.session.IoEvent.run(IoEvent.java:63)
at org.apache.mina.filter.executor.UnorderedThreadPoolExecutor$Worker.runTask(UnorderedThreadPoolExecutor.java:476)
at org.apache.mina.filter.executor.UnorderedThreadPoolExecutor$Worker.run(UnorderedThreadPoolExecutor.java:430)
at java.lang.Thread.run(Thread.java:748)