After https://github.com/iterative/dvc/pull/2307 `import-url` will lock stages by default, which could be either `dvc unlock`ed and `dvc repro`ed or simply `dvc update`ed.
After treeverse/dvc#2307
import-urlwill lock stages by default, which could be eitherdvc unlocked anddvc reproed or simplydvc updateed.