Guys needs help/suggestion fixing issue for configurable product with variations products approx 20, We are facing error in back-end

PHP Fatal error: Out of memory (allocated 1755320320) (tried to allocate 268435464 bytes) in /vendor/magento/module-configurable-product/Model/Product/Type/VariationMatrix.php on line 46

This seems to be known issue & also raised in Github issue page but can't see any working solution

Tried below solution :

  • Increase Memory limit: - Not worked
  • Increase max_input_var: Not worked
  • Code update as shown in Github issue fix : Not worked

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