diff --git a/python/PyQt6/core/class_map.yaml b/python/PyQt6/core/class_map.yaml
index 672fc0efb2c..eb503acd541 100644
--- a/python/PyQt6/core/class_map.yaml
+++ b/python/PyQt6/core/class_map.yaml
@@ -14422,7 +14422,7 @@ QgsRegularPolygon.toString: src/core/geometry/qgsregularpolygon.h#L194
 QgsRegularPolygon.toTriangle: src/core/geometry/qgsregularpolygon.h#L172
 QgsRegularPolygon: src/core/geometry/qgsregularpolygon.h#L40
 QgsRelation.addFieldPair: src/core/qgsrelation.h#L164
-QgsRelation.cardinalityToDisplayString: src/core/qgsrelation.h#L412
+QgsRelation.cardinalityToDisplayString: src/core/qgsrelation.h#L418
 QgsRelation.createFromXml: src/core/qgsrelation.h#L121
 QgsRelation.generateId: src/core/qgsrelation.h#L266
 QgsRelation.getReferencedFeature: src/core/qgsrelation.h#L238
@@ -14431,31 +14431,32 @@ QgsRelation.getReferencedFeatureRequest: src/core/qgsrelation.h#L228
 QgsRelation.getRelatedFeatures: src/core/qgsrelation.h#L186
 QgsRelation.getRelatedFeaturesFilter: src/core/qgsrelation.h#L208
 QgsRelation.getRelatedFeaturesRequest: src/core/qgsrelation.h#L198
-QgsRelation.hasEqualDefinition: src/core/qgsrelation.h#L361
+QgsRelation.hasEqualDefinition: src/core/qgsrelation.h#L367
 QgsRelation.id: src/core/qgsrelation.h#L261
-QgsRelation.isValid: src/core/qgsrelation.h#L343
+QgsRelation.isValid: src/core/qgsrelation.h#L349
 QgsRelation.name: src/core/qgsrelation.h#L247
-QgsRelation.polymorphicRelation: src/core/qgsrelation.h#L399
-QgsRelation.polymorphicRelationId: src/core/qgsrelation.h#L393
+QgsRelation.polymorphicRelation: src/core/qgsrelation.h#L405
+QgsRelation.polymorphicRelationId: src/core/qgsrelation.h#L399
 QgsRelation.referencedFields: src/core/qgsrelation.h#L325
 QgsRelation.referencedLayer: src/core/qgsrelation.h#L296
 QgsRelation.referencedLayerId: src/core/qgsrelation.h#L289
 QgsRelation.referencingFields: src/core/qgsrelation.h#L333
+QgsRelation.referencingFieldsAllowNull: src/core/qgsrelation.h#L339
 QgsRelation.referencingLayer: src/core/qgsrelation.h#L282
 QgsRelation.referencingLayerId: src/core/qgsrelation.h#L274
-QgsRelation.resolveReferencedField: src/core/qgsrelation.h#L367
-QgsRelation.resolveReferencingField: src/core/qgsrelation.h#L373
+QgsRelation.resolveReferencedField: src/core/qgsrelation.h#L373
+QgsRelation.resolveReferencingField: src/core/qgsrelation.h#L379
 QgsRelation.setId: src/core/qgsrelation.h#L134
 QgsRelation.setName: src/core/qgsrelation.h#L139
-QgsRelation.setPolymorphicRelationId: src/core/qgsrelation.h#L387
+QgsRelation.setPolymorphicRelationId: src/core/qgsrelation.h#L393
 QgsRelation.setReferencedLayer: src/core/qgsrelation.h#L154
 QgsRelation.setReferencingLayer: src/core/qgsrelation.h#L149
 QgsRelation.setStrength: src/core/qgsrelation.h#L144
 QgsRelation.strength: src/core/qgsrelation.h#L254
-QgsRelation.strengthToDisplayString: src/core/qgsrelation.h#L419
-QgsRelation.type: src/core/qgsrelation.h#L405
-QgsRelation.updateRelationStatus: src/core/qgsrelation.h#L381
-QgsRelation.validationError: src/core/qgsrelation.h#L353
+QgsRelation.strengthToDisplayString: src/core/qgsrelation.h#L425
+QgsRelation.type: src/core/qgsrelation.h#L411
+QgsRelation.updateRelationStatus: src/core/qgsrelation.h#L387
+QgsRelation.validationError: src/core/qgsrelation.h#L359
 QgsRelation.writeXml: src/core/qgsrelation.h#L129
 QgsRelation: src/core/qgsrelation.h#L43
 QgsRelationContext.project: src/core/qgsrelationcontext.h#L46
diff --git a/python/core/class_map.yaml b/python/core/class_map.yaml
index 50bc4cf556a..37d941376c8 100644
--- a/python/core/class_map.yaml
+++ b/python/core/class_map.yaml
@@ -14422,7 +14422,7 @@ QgsRegularPolygon.toString: src/core/geometry/qgsregularpolygon.h#L194
 QgsRegularPolygon.toTriangle: src/core/geometry/qgsregularpolygon.h#L172
 QgsRegularPolygon: src/core/geometry/qgsregularpolygon.h#L40
 QgsRelation.addFieldPair: src/core/qgsrelation.h#L164
-QgsRelation.cardinalityToDisplayString: src/core/qgsrelation.h#L412
+QgsRelation.cardinalityToDisplayString: src/core/qgsrelation.h#L418
 QgsRelation.createFromXml: src/core/qgsrelation.h#L121
 QgsRelation.generateId: src/core/qgsrelation.h#L266
 QgsRelation.getReferencedFeature: src/core/qgsrelation.h#L238
@@ -14431,31 +14431,32 @@ QgsRelation.getReferencedFeatureRequest: src/core/qgsrelation.h#L228
 QgsRelation.getRelatedFeatures: src/core/qgsrelation.h#L186
 QgsRelation.getRelatedFeaturesFilter: src/core/qgsrelation.h#L208
 QgsRelation.getRelatedFeaturesRequest: src/core/qgsrelation.h#L198
-QgsRelation.hasEqualDefinition: src/core/qgsrelation.h#L361
+QgsRelation.hasEqualDefinition: src/core/qgsrelation.h#L367
 QgsRelation.id: src/core/qgsrelation.h#L261
-QgsRelation.isValid: src/core/qgsrelation.h#L343
+QgsRelation.isValid: src/core/qgsrelation.h#L349
 QgsRelation.name: src/core/qgsrelation.h#L247
-QgsRelation.polymorphicRelation: src/core/qgsrelation.h#L399
-QgsRelation.polymorphicRelationId: src/core/qgsrelation.h#L393
+QgsRelation.polymorphicRelation: src/core/qgsrelation.h#L405
+QgsRelation.polymorphicRelationId: src/core/qgsrelation.h#L399
 QgsRelation.referencedFields: src/core/qgsrelation.h#L325
 QgsRelation.referencedLayer: src/core/qgsrelation.h#L296
 QgsRelation.referencedLayerId: src/core/qgsrelation.h#L289
 QgsRelation.referencingFields: src/core/qgsrelation.h#L333
+QgsRelation.referencingFieldsAllowNull: src/core/qgsrelation.h#L339
 QgsRelation.referencingLayer: src/core/qgsrelation.h#L282
 QgsRelation.referencingLayerId: src/core/qgsrelation.h#L274
-QgsRelation.resolveReferencedField: src/core/qgsrelation.h#L367
-QgsRelation.resolveReferencingField: src/core/qgsrelation.h#L373
+QgsRelation.resolveReferencedField: src/core/qgsrelation.h#L373
+QgsRelation.resolveReferencingField: src/core/qgsrelation.h#L379
 QgsRelation.setId: src/core/qgsrelation.h#L134
 QgsRelation.setName: src/core/qgsrelation.h#L139
-QgsRelation.setPolymorphicRelationId: src/core/qgsrelation.h#L387
+QgsRelation.setPolymorphicRelationId: src/core/qgsrelation.h#L393
 QgsRelation.setReferencedLayer: src/core/qgsrelation.h#L154
 QgsRelation.setReferencingLayer: src/core/qgsrelation.h#L149
 QgsRelation.setStrength: src/core/qgsrelation.h#L144
 QgsRelation.strength: src/core/qgsrelation.h#L254
-QgsRelation.strengthToDisplayString: src/core/qgsrelation.h#L419
-QgsRelation.type: src/core/qgsrelation.h#L405
-QgsRelation.updateRelationStatus: src/core/qgsrelation.h#L381
-QgsRelation.validationError: src/core/qgsrelation.h#L353
+QgsRelation.strengthToDisplayString: src/core/qgsrelation.h#L425
+QgsRelation.type: src/core/qgsrelation.h#L411
+QgsRelation.updateRelationStatus: src/core/qgsrelation.h#L387
+QgsRelation.validationError: src/core/qgsrelation.h#L359
 QgsRelation.writeXml: src/core/qgsrelation.h#L129
 QgsRelation: src/core/qgsrelation.h#L43
 QgsRelationContext.project: src/core/qgsrelationcontext.h#L46