Coding⏱️ 3 min read📅 2026-06-03
How to Fix ERROR 1067 Error – ERROR 1067 (42000): Invalid default value for 'created_at'
Invalid default value for 'created_at' when adding a new column to a table.
Quick Answer: The error occurs because you are trying to add a new column with the same name as an existing column ('created_at') and specifying a default value for it. To fix this, remove the default value from the ALTER TABLE statement.
📋 Table of Contents
The error 'ERROR 1067 (42000): Invalid default value for 'created_at'
🔍 Why This Happens
- When you try to add a new column with the name 'created_at' or any other column that already exists in your table, MySQL prevents it because the column already has a default value assigned. In this case, the error occurs when trying to alter the table by adding a new column named 'created_at'.
- Another reason for this error is if you're using an older version of MySQL and have enabled strict mode. Strict mode checks for certain invalid SQL syntax that may not be valid in earlier versions.
🔧 Proven Troubleshooting Steps
Drop the existing column before adding a new one
- Step 1: To fix this issue, you need to drop the existing 'created_at' and 'updated_at' columns from your table.
- Step 2: Run the following SQL query to drop the columns: ALTER TABLE investments DROP COLUMN created_at, DROP COLUMN updated_at;
- Step 3: After dropping these columns, you can safely add a new column with the desired name without encountering any errors.
Use an alternative approach
- Step 1: One alternative method is to rename one of the existing 'created_at' or 'updated_at' columns to something else, like 'old_created_at' or 'old_updated_at'. Then you can add your new column with a different name.
- Step 2: After renaming these columns, you should be able to add your new column without encountering any errors.
✨ Wrapping Up
By following one of the above methods, you should be able to resolve the 'ERROR 1067 (42000): Invalid default value for 'created_at'
❓ Frequently Asked Questions
When you try to add a new column with the name 'created_at' or any other column that already exists in your table, MySQL prevents it because the column already has a default value assigned. In this case, the error occurs when trying to alter the table by adding a new column named 'created_at'.Anothe
Step 1: To fix this issue, you need to drop the existing 'created_at' and 'updated_at' columns from your table.Step 2: Run the following SQL query to drop the columns: ALTER TABLE investments DROP COLUMN created_at, DROP COLUMN updated_at;Step 3: After dropping these columns, you can safely add a ne
Step 1: One alternative method is to rename one of the existing 'created_at' or 'updated_at' columns to something else, like 'old_created_at' or 'old_updated_at'. Then you can add your new column with a different name.Step 2: After renaming these columns, you should be able to add your new column wi
By following one of the above methods, you should be able to resolve the 'ERROR 1067 (42000): Invalid default value for 'created_at'
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