Mandatory External references are still on error when filled on creation form

[ValentinBouzinFiligran]

Description

Mandatory External references are still on error when filled on creation form

Reproducible Steps

• On customization form, enable "Enforce references" for malware analysis
• Open the malware analysis creation form
• Complete all mandatory fields
• On create, i have an error on the external references fields

[SarahBocognano]

Should be fix with this PR: https://github.com/OpenCTI-Platform/opencti/pull/6727/files