Error: DynamoDB Invalid UpdateExpression Syntax Error Token

Answered by Rafal Wilinski
Solution
The 'UpdateExpression' parameter you're using in your request is incorrect and could not be parsed.
Troubleshooting steps:
- Make sure you're not using one of the reserved keywords.. Use 'ExpressionAttributeNames' to replace conflicting attribute names with proxies.
- Make sure that none of your attribute names begins with underscore (_), it cannot be the first character.
- Use libraries like dynoexpr which might prevent creating silly mistakes in UpdateExpressions.
Other Common DynamoDB Errors (with Solutions)
- DynamoDB scan limit not working
- Boto3 DynamoDB KeyError
- ExpressionAttributeValues contains invalid value: One or more parameter values were invalid: An AttributeValue may not contain an empty string
- DynamoDB Is Not Null
- Unable to start DynamoDB Local process
- DynamoDB Query Limit Not Working
- dynamodb attribute does not exist
- dynamodb system errors metric
- the dynamodb service does not have version
- dynamodb local unable to locate credentials
- a cell may contain a maximum of 30000 characters dynamodb
- AWS DynamoDB Provisioning Error
- dynamodb getItem() is not a function
- dynamodb cannot read properties of undefined (reading 'bytelength')
- error dynamodb streams must be enabled on the table
Better DynamoDB experience.
First 7 days are. No credit card needed.
Product Features
DynamoDB Tools
DynamoDB Info
© 2025 Dynobase