"LWCHardAttDefinition 'releaseConfigurationBaselineReference' on the 'com.ptc.wpcfg.doc.VariantSpec' type is possibly no longer modeled" at MethodServer startup after update in Windchill PDMLink

ERROR [main] com.ptc.core.lwc.server.cache.factory.AttributeDefinitionViewFactory  - LWCHardAttDefinition 'releaseConfigurationBaselineReference' on the 'com.ptc.wpcfg.doc.VariantSpec' type is possibly no longer modeled. You can ignore this error logging during upgrade phase.
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com.ptc.core.meta.common.IllegalFormatException
at com.ptc.core.meta.common.impl.LogicalIdentifierFactory._translate(LogicalIdentifierFactory.java:515)
at com.ptc.core.meta.common.impl.LogicalIdentifierFactory.get(LogicalIdentifierFactory.java:1077)
at com.ptc.core.lwc.server.cache.factory.AttributeDefinitionViewFactory.getDefinitionID(AttributeDefinitionViewFactory.java:285)
at com.ptc.core.lwc.server.cache.factory.AttributeDefinitionViewFactory.newAttributeDefintionView(AttributeDefinitionViewFactory.java:193)
at com.ptc.core.lwc.server.cache.AttHelper.translateAttDefsToViews(AttHelper.java:1023)
at com.ptc.core.lwc.server.cache.TypeDefinitionManager.translateTypeDefToView(TypeDefinitionManager.java:2362)
at com.ptc.core.lwc.server.cache.TypeDefinitionManager.retrieveAndCacheType(TypeDefinitionManager.java:421)
at com.ptc.core.lwc.server.cache.TypeDefinitionManager.getTypeDefView(TypeDefinitionManager.java:372)
at com.ptc.core.lwc.server.cache.TypeDefinitionManager.getRootTypeDefViews(TypeDefinitionManager.java:721)
at com.ptc.core.lwc.server.StandardTypeDefinitionService.getRootTypeDefViews(StandardTypeDefinitionService.java:336)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:4