inconsequential
adj.not important or having very little effect on a situation. You use this to describe something that does not change the final result.
adj.having little or no importance or effect; trivial in significance. Often used to describe minor details that do not impact the overall outcome of a larger event.
“The small mistake was inconsequential to the final result.”
“While the individual errors were inconsequential, they added up to a significant delay in the project timeline.”
“In the grand scheme of the company's expansion, the minor administrative oversight proved inconsequential, though it served as a useful lesson for the new team.”
“But when the film finally fades to black, after an eventful but also dull story, it’s almost difficult to credit how inconsequential and throwaway it’s all been.”
From in- + consequential.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.