Sen. Elizabeth Warren wrote “American Indian” next to the designation of “Race” when she filed her registration card with the State Bar of Texas in the 1980s, according to a document that emerged on Tuesday.

The registration card, which was obtained by The Washington Post through a records request, was filled out and signed by Warren in 1986, the newspaper reported.

The document shows another — previously unreported — example of the now-senator identifying herself as Native American.

According to a DNA test Warren took, her Native American ancestry is only marginal. In an interview with the newspaper, Warren again apologized for saying she was of Native American ancestry.

“I can’t go back,” Warren, a Democratic presidential hopeful, said. “But I am sorry for furthering confusion on tribal sovereignty and tribal citizenship and harm that resulted.”

Warren was previously listed as a Native American while working at both Harvard and the University of Pennsylvania. But an investigation by The Boston Globe showed her ethnicity was changed after she started working at the schools — and officials claimed she did not get preferential treatment because of it.

President Trump has repeatedly attacked Warren for labeling herself Native American and has pejoratively referred to her as “Pocahontas” on the campaign trail and in skewering tweets.

Warren sought to put the issue to bed in October 2018 by taking an ancestry test — but the results backfired, showing that her only Native American blood stretched back six to 10 generations ago.

She announced the results in a carefully produced video that traced back her apparent Native American ancestry and beat back assertions that she benefitted professionally by calling herself an American Indian.

The Massachusetts senator apologized last week to a Cherokee chief for the “confusion” caused by her use of the DNA test.

“I’m not a tribal citizen and I respect the difference,” she told CNN after her mea culpa to Cherokee Principal Chief Bill John Baker. “Tribes and only tribes determine tribal citizenship.”

After Warren released the results of the DNA test, Trump unloaded a series of attacks on her.

“Pocahontas (the bad version), sometimes referred to as Elizabeth Warren, is getting slammed. She took a bogus DNA test and it showed that she may be 1/1024, far less than the average American. Now Cherokee Nation denies her, ‘DNA test is useless.’ Even they don’t want her. Phony!” Trump tweeted.