Allow in newer versions doesn't seem to be backwards compatible?

[williamblevins]

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Support plan

• is this issue currently blocking your project? (yes/no): no
• is this issue affecting a production system? (yes/no): no

Context

• node version: v14.17.5
• module version: 17.4.2 (tried other versions also)
• environment (e.g. node, browser, native): node
• used with (e.g. hapi application, another framework, standalone, ...): N/A
• any other relevant information: N/A

How can we help?

joi.string().allow('HEAD').hex().min(6).max(40).lowercase().required() does not allow for the string HEAD, which is explicitly allowed. Can someone explain what I am doing wrong?

[williamblevins]

Looks like I can work around this with this joi.alternatives(joi.string().valid('HEAD'), joi.string().hex().min(6).max(40).lowercase()).required().