A common definition of "history" is "the time when writing has existed", but in some ways that's not a very practical definition. Writing started out as something that wasn't used as much as it would be later. It was scattered & spotty, with wide chronological & geographical gaps between one example and another, and the subjects were generally limited to either laws/decrees/treaties or mythology/prayers... maybe sometimes, at best, if we're lucky, letters from one city's king or ambassador to that of another city. That's not really a good source of a lot of information about things that actually happened back then.

Some (I have no idea how many) historians & archeologists prefer a definition based more on practicality than on an arbitrary technicality: "history" by this kind of definition begins when writing is common enough to be used for more subjects, which are more historically informative to us, including writing about history itself along with various other subjects like philosophy, science, politics, art, music, linguistics, open & deliberate fiction, and foreign (to the author) cultures. When writing takes on that kind of life of its own and starts giving us something we could seriously call a historical "record" instead of just scattered hits & misses, it's called the beginning of "historiography", which gives us what some historians call the "historiographic" age/era/period, starting several centuries after the Iron Age did (400s BCE in Greece, 100s/200s BCE in Rome). In Greek history, this is also generally called the "Classical" Greek era.

1. Stone Ages (Paleolithic, Mesolithic, Neolithic)
2. Bronze Age
3. Iron Age
4. Historiographic Age/Era/Period

https://en.wikipedia.org/wiki/Historiography#Antiquity

If it's bubbling under the new paint where the stain was that you're trying to cover, then it sounds like that "stain" is a water leak still having more water added, not just an old stain. If so, you need to NOT just try to cover it with paint; you need get behind the drywall and deal with whatever the water is coming from.