What Are Some Common Salesforce Errors And How to Resolve Them?

Working in Salesforce involves mistakes from time to time; sometimes, they are easy to spot, while other times, resolving them can take hours of debugging if you do not know what you are doing.

This guide covers some of the most common Salesforce errors, what they actually mean, and how you can resolve them without wasting time digging through logs blindly.

Quick Overview

Error Message	What It Means	How to Fix It
REQUIRED_FIELD_MISSING	A required field is empty	Provide all mandatory fields
INSUFFICIENT_ACCESS_ON_CROSS_REFERENCE_ENTITY	No access to related record	Check permissions and sharing
FIELD_CUSTOM_VALIDATION_EXCEPTION	Validation rule failed	Review the rule and input
DUPLICATE_VALUE	Duplicate record detected	Adjust duplicate rules or data
INVALID_FIELD_FOR_INSERT_UPDATE	Field is not writable	Remove or fix field permissions
STRING_TOO_LONG	Value exceeds limit	Trim the input

REQUIRED_FIELD_MISSING

What it means

This error shows up when you try to create or update a record without providing a required field.

Why it happens

Usually one of the following:

• A required field was left empty
• An API request didn’t include all required fields
• A validation rule is enforcing required input

How to fix it

Check the object fields and make sure all required ones are included. If this is coming from an integration, validate the payload before sending it. If you’re working with integration services, make sure your data mapping includes all mandatory fields before the request reaches Salesforce.

INSUFFICIENT_ACCESS_ON_CROSS_REFERENCE_ENTITY

What it means

The user doesn’t have access to a related record being referenced.

Why it happens

• Missing permissions on the object
• Record is not shared with the user
• Lookup field points to a restricted record

How to fix it

Start with the user’s profile and permission sets. Then check record-level sharing and role hierarchy. In most cases, this is a simple access issue. A Salesforce expert can quickly diagnose whether the problem is field-level security, object permissions, or sharing rules.

This is one of the most common errors in multi-team implementations where access control isn’t properly configured from the start.

FIELD_CUSTOM_VALIDATION_EXCEPTION

What it means

A validation rule has blocked the operation.

Why it happens

• Business rule conditions are not met
• Required logic is failing
• Field values don’t satisfy the rule

How to fix it

Go to the object’s validation rules in Setup and identify which rule is firing. Either correct the submitted data or update the rule if it’s overly restrictive.

During implementation, an implementation expert reviews validation rules to ensure they support your workflow, not block it. Too many validation rules without clear documentation is a sign of poor configuration.

DUPLICATE_VALUE

What it means

Salesforce is preventing a duplicate value from being saved.

Why it happens

• Duplicate rules are active
• A field is marked as unique

How to fix it

Check duplicate rules and matching rules. If duplicates are expected in your use case, you may need to relax the rules or adjust your data handling. For companies managing data across multiple systems, an MSP partner can help configure duplicate prevention that works across your entire tech stack—Salesforce, ERP, and other platforms.

INVALID_FIELD_FOR_INSERT_UPDATE

What it means

You’re trying to write to a field that isn’t editable.

Why it happens

• Field is read-only
• It’s a formula or system field
• Field-level security restricts access

How to fix it

Remove that field from your update or insert request. If needed, review field-level security to confirm whether it should be editable.

STRING_TOO_LONG

What it means

The value you’re trying to save is longer than the field allows.

Why it happens

• Input data exceeds character limits
• Integration sends unvalidated text

How to fix it

Check the field’s length and trim the value accordingly. It’s a good idea to validate this before sending data to Salesforce.

INVALID_CROSS_REFERENCE_KEY

What it means

The record ID being used is invalid or not accessible.

Why it happens

• Incorrect ID format
• Record doesn’t exist
• Wrong environment (sandbox vs production)

How to fix it

Verify the ID and make sure it belongs to the correct object and environment. Also confirm the user has access to that record.

MIXED_DML_OPERATION

What it means

Salesforce does not allow changes to setup objects and non-setup objects in the same transaction.

Why it happens

For example, updating a User record and an Account record together in one transaction.

How to fix it

Separate the operations. In Apex, you can use future methods or queueable jobs to handle this cleanly.

“`

@future

public static void updateUserAsync() {

   // handle user update separately

}

“`

UNABLE_TO_LOCK_ROW

What it means

Another process is currently updating the same record.

Why it happens

• Parallel updates
• Bulk operations running at the same time

How to fix it

Introduce retry logic or reduce concurrency. This is common in integrations and batch processing.

INVALID_SESSION_ID

What it means

The session used for the request is no longer valid.

Why it happens

• Session expired
• Invalid or outdated token

How to fix it

Re-authenticate and generate a new session. For integrations, make sure token refresh logic is in place.

How to Debug Salesforce Errors

If the error message isn’t clear enough, debugging becomes important.

Common tools you should use:

• Debug Logs
• Developer Console
• Workbench

Here’s what a typical debug interface looks like:

Start by enabling debug logs for the affected user, reproduce the issue, and then trace what went wrong step by step.

Common Mistakes That Lead to Errors

A lot of recurring issues come from the same patterns:

• Overly strict validation rules
• Incorrect permission setup
• Hardcoded IDs in Apex
• Poor handling of API data

Fixing these at the design level prevents many errors later.

Best Practices to Avoid Salesforce Errors

• Validate data before saving or sending
• Avoid hardcoding record IDs
• Use proper exception handling in Apex
• Test changes in sandbox before deploying
• Monitor logs regularly

Final Thoughts

Salesforce errors are not always complex, but they can slow things down if you don’t recognize them quickly. Once you understand the common ones and how they behave, troubleshooting becomes much faster.

If your team frequently deals with these issues, it usually points to gaps in validation, permissions, or integration design. Fixing those areas will reduce errors significantly over time.