Users are encountering a vague error message preventing them from saving or previewing theme changes: “correct the dynamic source error(s) in the following templates.” The error provides no specific details about what needs fixing.
Common trigger: Adding new collections to pages or working with metafields that were later deleted from Shopify.
Root cause identified: When metafields are deleted from Shopify’s admin, their references often remain in theme template files (like product.json), causing the error.
Solution that worked:
Access the theme code editor
Locate the relevant template file (e.g., product.json or product.TEMPLATE_NAME.json)
Search for and delete leftover metafield code references
Save changes
One user resolved it by reverting modified theme files to defaults and checking for syntax errors. Multiple users confirmed this metafield cleanup approach successfully fixed the issue.
Status: Workaround identified, though the error message itself remains unhelpfully vague. Users recommend backing up stores before making theme edits.
Summarized with AI on October 24.
AI used: claude-sonnet-4-5-20250929.
I can’t say for sure. I went into the code editor, looked up all the files that had changed, then I went around and made bunch of copies of them. Started reversing them to their default theme files and it stopped showing the error. I know it’s not really helpful, but I somehow managed to fix it by reversing some theme files and checking for syntax errors
I’m freaking out because I’m facing the same issue just days before Launch. Can you please explain
“Started reversing them to their default theme files”
Issue:
I was getting this error message “To preview or save your changes, correct the dynamic source error(s) in the default theme template”
Why:
I was using metafields to build my store (I added and deleted some metafields while building it).
Cause:
Although the metafield was deleted from the shopify store the code still existed in the theme editor.
Solution (i am not a developer):
Go into the theme editor, find the product template (in my case i was editing the default product page so i had to go to product.json for you it might be product.PRODUCT_TEMPLATE_NAME.json) and find the metafield you deleted but code still exist. Delete it. Save. And should work. At least this is what worked for me.
See below for the code i had to delete which was left over after deleting the metafield from inside shopify.
Moral of the story:
Even when you delete something from inside shopify they code my still exist so you need to may get error messages. And backup your store before editing anything )