prevent duplicates in `formattedOptions` in `FormData`

        // Populate keep-options from cache

        Object.entries(keepOptions).forEach(([key, option]) => {

            if (option.value && getSourceType(option.value) === currentSource.value) {

                // check if option (with same id) is already in result, if yes replace it with keepOption

                const existingOptionIndex = result.findIndex((v) => v.value?.id === option.value?.id);

                if (existingOptionIndex >= 0) {

                    result[existingOptionIndex] = option;

                } else {

                    result.unshift(option);

                }

            }

        });

        // Sort entries by hid

        result.sort((a, b) => {