How to fix INVALID_ID_FIELD in Salesforce deployments

A record ID passed to a lookup or DML operation is malformed, wrong length, or belongs to the wrong object.

Surfaces during: runtime DML and lookup assignment, not metadata deploy

What it means

INVALID_ID_FIELD means the ID Salesforce received does not resolve to a valid record for the field it was passed into. This is almost always a hardcoded or mishandled ID: the wrong length, the wrong case, or an ID that belongs to a different object than the field expects.

Every Salesforce record ID carries a three-character key prefix identifying its object, 001 for Account, 003 for Contact, and so on, so this error commonly traces back to an ID from the wrong object being assigned to a lookup that expects a different one.

Diagnosis

Common causes

15-character ID instead of 18

A record ID copied from a browser URL is the case-sensitive 15-character version, and casing or truncation corrupted it somewhere along the way.

Org-specific ID reused in the target org

An ID from the source org was hardcoded into metadata or test code, but that exact ID does not correspond to any record in the target org.

Wrong object type for the lookup

The ID's key prefix belongs to a different object than the lookup field expects, for example a Contact ID passed into an Account field.

The fix

Always use the 18-character ID
Standardize on the case-insensitive 18-character record ID in code and never hardcode a 15-character one.
Look up by an external ID instead
Replace hardcoded record IDs with a query against a stable external ID or unique field so the reference resolves per org.

Verify the object type matches

Check the ID's three-character key prefix against the object the field expects before passing it in.

Id anyId = '001XXXXXXXXXXXXXXX';
String prefix = String.valueOf(anyId).left(3);
System.debug(Schema.getGlobalDescribe().values());

In practice

How Serpent prevents this

Serpent AI resolves references by business key instead of raw record ID when moving changes between environments, so this class of error does not reach a deploy. See the Salesforce deployment error library.

Metadata and data in one deployment flow in Serpent

Prevention

Type record ID variables as Id, not String

Use the Id Apex type instead of String for anything holding a record identifier, so a malformed or wrong-length value fails at assignment, not deep in a DML call.

Never copy record IDs from a browser URL into code

Query for the record by a stable field instead of pasting an ID observed in a URL, which is easy to truncate or mistype.

Validate object type at the point of assignment for dynamic lookups

When a lookup field's target object is determined dynamically, check the incoming ID's key prefix against the expected object before assignment.

Common questions

INVALID_ID_FIELD, answered

How do I tell an 18-character ID from a 15-character one?

The 18-character ID always ends in three additional case-insensitive characters after the original 15. If an ID is exactly 15 characters, treat it as unsafe to hardcode.

Are key prefixes the same across every Salesforce org?

Standard object prefixes like 001 for Account are consistent across orgs, but custom object prefixes are assigned per org at object creation and differ between environments.

Does Id.valid() in Apex catch every case this error covers?

It checks that a string is syntactically a valid ID shape, but it doesn't confirm the record actually exists or belongs to the right object; both checks are still needed.

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