Don't assume parameter vector names are unique

 #Fix conflicts

qiskit/qpy/binary_io/value.py

@@ -396,8 +396,9 @@ def _read_parameter_vec(file_obj, vectors):
     )
     param_uuid = uuid.UUID(bytes=data.uuid)
     name = file_obj.read(data.vector_name_size).decode(common.ENCODE)
-    if name not in vectors:
-        vectors[name] = (ParameterVector(name, data.vector_size), set())
+
+    # if name not in vectors:
+    vectors[name] = (ParameterVector(name, data.vector_size), set())
     vector = vectors[name][0]
     if vector[data.index].uuid != param_uuid:
         vectors[name][1].add(data.index)

test/qpy_compat/test_qpy.py

@@ -652,6 +652,14 @@ def generate_clifford_circuits():
     return [qc]
 
 
+def generate_blueprint_circuits():
+    """Test qpy with blueprint circuits."""
+    from qiskit.circuit.library import PauliFeatureMap
+
+    qc = PauliFeatureMap(feature_dimension=5, reps=1)
+    return [qc]
+
+
 def generate_annotated_circuits():
     """Test qpy circuits with annotated operations."""
     from qiskit.circuit import AnnotatedOperation, ControlModifier, InverseModifier, PowerModifier
@@ -829,6 +837,7 @@ def generate_circuits(version_parts):
         "string_parameters.qpy": [generate_string_parameters()],
         "register_edge_cases.qpy": generate_register_edge_cases(),
         "parameterized.qpy": [generate_parameterized_circuit()],
+        "blueprint.qpy": [generate_blueprint_circuits()],
     }
     if version_parts is None:
         return output_circuits