[BUG]ValueError: [E090] Extension 'similarity' already exists on Span. To overwrite the existing extension, set `force=True` on `Span.set_extension`.

[nitzanbar29]

Describe the bug
Hi, I use the example in the demo.

I'm facing this error:

ValueError: [E090] Extension 'similarity' already exists on Span. To overwrite the existing extension, set force=True on Span.set_extension.

To Reproduce

common English pipeline

nlp = spacy.load('en_core_web_sm')

@Language.component('quickumls_component')
def quickumls_component(doc):
return SpacyQuickUMLS(nlp, umls_path1)(doc)

quickumls_component = SpacyQuickUMLS(nlp, umls_path1)
nlp.add_pipe('quickumls_component', last=True)

doc = nlp('Pt c/o shortness of breath, chest pain, nausea, vomiting, diarrrhea')

for ent in doc.ents:
print('Entity text : {}'.format(ent.text))
print('Label (UMLS CUI) : {}'.format(ent.label_))
print('Similarity : {}'.format(ent..similarity))
print('Semtypes : {}'.format(ent..semtypes))

**Environment **

• OS: Unbuntu
• QuickUMLS version 1.4.0
• UMLS version 2023

Thanks :)

[rmalla1]

I am facing the same issue.

[JuneHou]

Got the same error code here.

[msegar]

Same issue

[RuiqiTu]

You define multiple SpacyQuickUMLS instances in your code:

@Language.component('quickumls_component')
def quickumls_component(doc):
quickumls_component = SpacyQuickUMLS(nlp, umls_path1)

The Span.set_extension method is called repeatedly during each instantiation, and Spacy does not allow repeated definition of the same extension attributes (like similarity and semtypes), so delete quickumls_component.