identify this berry in my Southern Cal backyard?

Hi, Can someone help identify this plant growing in my old, no longer used, horse corral? There are many growing in this corral, but nothing outside the corral. Thinking its the horse manure? Deep red stem, a cluster of plants are in the shade and a cluster is in the sun. I live in a warm inland San Diego County valley. No water provided, can freeze in winter.

Pokeweed. toxic except for very early shoots in spring.

young greens are very good. 1berry a day is supposed to be good for you but don't eat the seed. the greens are usually boiled drained rinsed and boiled again