Thomas Heigl ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *updated* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiZTExNjEwNzMz... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-15645?atlOrigin=eyJpIjoiZTExNj... ) HHH-15645 ( https://hibernate.atlassian.net/browse/HHH-15645?atlOrigin=eyJpIjoiZTExNj... ) UnknownTableReferenceExceptions since 6.1.1 ( https://hibernate.atlassian.net/browse/HHH-15645?atlOrigin=eyJpIjoiZTExNj... ) Change By: Thomas Heigl ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) We are getting UnknownTableReferenceExceptions for various queries after upgrading from 6.1. 4 0 to 6.1. 5 1. E.g: {noformat}Caused by: org.hibernate.sql.ast.tree.from.UnknownTableReferenceException: Unable to determine TableReference (`user_connection`) for `com.my.project.UserConnection(373713700146208).owner` at org.hibernate.sql.ast.tree.from.LazyTableGroup.resolveTableReference(LazyTableGroup.java:256) at org.hibernate.query.sqm.sql.internal.EntityValuedPathInterpretation.from(EntityValuedPathInterpretation.java:318) at org.hibernate.query.sqm.sql.internal.EntityValuedPathInterpretation.from(EntityValuedPathInterpretation.java:232) at org.hibernate.query.sqm.sql.internal.EntityValuedPathInterpretation.from(EntityValuedPathInterpretation.java:117) at org.hibernate.query.sqm.sql.BaseSqmToSqlAstConverter.lambda$visitEntityValuedPath$57(BaseSqmToSqlAstConverter.java:3820) at org.hibernate.query.sqm.sql.BaseSqmToSqlAstConverter.prepareReusablePath(BaseSqmToSqlAstConverter.java:3136) at org.hibernate.query.sqm.sql.BaseSqmToSqlAstConverter.prepareReusablePath(BaseSqmToSqlAstConverter.java:3098) at org.hibernate.query.sqm.sql.BaseSqmToSqlAstConverter.visitEntityValuedPath(BaseSqmToSqlAstConverter.java:3820) at org.hibernate.query.sqm.sql.BaseSqmToSqlAstConverter.visitEntityValuedPath(BaseSqmToSqlAstConverter.java:416) at org.hibernate.query.sqm.tree.domain.SqmEntityValuedSimplePath.accept(SqmEntityValuedSimplePath.java:62) at org.hibernate.query.sqm.sql.BaseSqmToSqlAstConverter.visitComparisonPredicate(BaseSqmToSqlAstConverter.java:6529) at org.hibernate.query.sqm.sql.BaseSqmToSqlAstConverter.visitComparisonPredicate(BaseSqmToSqlAstConverter.java:416) at org.hibernate.query.sqm.tree.predicate.SqmComparisonPredicate.accept(SqmComparisonPredicate.java:104) at org.hibernate.query.sqm.sql.BaseSqmToSqlAstConverter.visitJunctionPredicate(BaseSqmToSqlAstConverter.java:6333) at org.hibernate.query.sqm.sql.BaseSqmToSqlAstConverter.visitJunctionPredicate(BaseSqmToSqlAstConverter.java:416) at org.hibernate.query.sqm.tree.predicate.SqmJunctionPredicate.accept(SqmJunctionPredicate.java:74) at org.hibernate.query.sqm.sql.BaseSqmToSqlAstConverter.visitWhereClause(BaseSqmToSqlAstConverter.java:2252) at org.hibernate.query.sqm.sql.BaseSqmToSqlAstConverter.visitQuerySpec(BaseSqmToSqlAstConverter.java:1823) at org.hibernate.query.sqm.sql.BaseSqmToSqlAstConverter.visitQuerySpec(BaseSqmToSqlAstConverter.java:416) at org.hibernate.query.sqm.tree.select.SqmQuerySpec.accept(SqmQuerySpec.java:122) at org.hibernate.query.sqm.spi.BaseSemanticQueryWalker.visitQueryPart(BaseSemanticQueryWalker.java:213) at org.hibernate.query.sqm.sql.BaseSqmToSqlAstConverter.visitQueryPart(BaseSqmToSqlAstConverter.java:1679) at org.hibernate.query.sqm.sql.BaseSqmToSqlAstConverter.visitSubQueryExpression(BaseSqmToSqlAstConverter.java:6060) at org.hibernate.query.sqm.sql.BaseSqmToSqlAstConverter.visitSubQueryExpression(BaseSqmToSqlAstConverter.java:416) at org.hibernate.query.sqm.tree.select.SqmSubQuery.accept(SqmSubQuery.java:641) at org.hibernate.query.sqm.sql.BaseSqmToSqlAstConverter.visitExistsPredicate(BaseSqmToSqlAstConverter.java:6867) at org.hibernate.query.sqm.tree.predicate.SqmExistsPredicate.accept(SqmExistsPredicate.java:60) at org.hibernate.query.sqm.sql.BaseSqmToSqlAstConverter.visitJunctionPredicate(BaseSqmToSqlAstConverter.java:6333) at org.hibernate.query.sqm.sql.BaseSqmToSqlAstConverter.visitJunctionPredicate(BaseSqmToSqlAstConverter.java:416) at org.hibernate.query.sqm.tree.predicate.SqmJunctionPredicate.accept(SqmJunctionPredicate.java:74) at org.hibernate.query.sqm.sql.BaseSqmToSqlAstConverter.visitWhereClause(BaseSqmToSqlAstConverter.java:2252) at org.hibernate.query.sqm.sql.BaseSqmToSqlAstConverter.visitQuerySpec(BaseSqmToSqlAstConverter.java:1823) at org.hibernate.query.sqm.sql.BaseSqmToSqlAstConverter.visitQuerySpec(BaseSqmToSqlAstConverter.java:416) at org.hibernate.query.sqm.tree.select.SqmQuerySpec.accept(SqmQuerySpec.java:122) at org.hibernate.query.sqm.spi.BaseSemanticQueryWalker.visitQueryPart(BaseSemanticQueryWalker.java:213) at org.hibernate.query.sqm.sql.BaseSqmToSqlAstConverter.visitQueryPart(BaseSqmToSqlAstConverter.java:1679) at org.hibernate.query.sqm.sql.BaseSqmToSqlAstConverter.visitSelectStatement(BaseSqmToSqlAstConverter.java:1477) at org.hibernate.query.sqm.sql.BaseSqmToSqlAstConverter.visitSelectStatement(BaseSqmToSqlAstConverter.java:416) at org.hibernate.query.sqm.tree.select.SqmSelectStatement.accept(SqmSelectStatement.java:199) at org.hibernate.query.sqm.sql.BaseSqmToSqlAstConverter.translate(BaseSqmToSqlAstConverter.java:711) at org.hibernate.query.sqm.internal.ConcreteSqmSelectQueryPlan.buildCacheableSqmInterpretation(ConcreteSqmSelectQueryPlan.java:350) at org.hibernate.query.sqm.internal.ConcreteSqmSelectQueryPlan.withCacheableSqmInterpretation(ConcreteSqmSelectQueryPlan.java:270) at org.hibernate.query.sqm.internal.ConcreteSqmSelectQueryPlan.performList(ConcreteSqmSelectQueryPlan.java:246) at org.hibernate.query.sqm.internal.QuerySqmImpl.doList(QuerySqmImpl.java:546) at org.hibernate.query.spi.AbstractSelectionQuery.list(AbstractSelectionQuery.java:363) at org.hibernate.query.sqm.internal.QuerySqmImpl.list(QuerySqmImpl.java:1032){noformat} I’ll try to create a reproducer in the coming days. 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