We made no such promise. Even Gorbachev confirmed, directly, that question wasn’t even brought up.
James Baker was confined to the topic of German reunification while the Soviet Union and Warsaw Pact existed.
The proposal was, if Eastern Germany reunified with West Germany, NATO wouldn’t move into east Germany.
That’s all.
And, Gorbachev and Scheherazade both decided not to include that in the final agreement.
Within two years the entire question was rendered moot by the Belovezha Accords. Which granted every nation formerly in the Warsaw Pact or USSR the freedom to choose EEC over CIS, or NATO over CSTO. Poland and the Baltics chose EU and NATO, Belarus didn’t, and Ukraine sat on the fence entirely until Putin and Medvedev tried using blackmail and political assassination to bully Ukraine into their camp.
Stop repeating Russian revisionist fiction.
You're lying:
https://nsarchive.gwu.edu/briefing-book/russia-programs/2017-12-12/nato-expansion-what-gorbachev-heard-western-leaders-early
Washington D.C., December 12, 2017 – U.S. Secretary of State James Baker’s famous “not one inch eastward” assurance about NATO expansion in his meeting with Soviet leader Mikhail Gorbachev on February 9, 1990, was part of a cascade of assurances about Soviet security given by Western leaders to Gorbachev and other Soviet officials throughout the process of German unification in 1990 and on into 1991, according to declassified U.S., Soviet, German, British and French documents posted today by the National Security Archive at George Washington University (http://nsarchive.gwu.edu).
https://nsarchive.gwu.edu/briefing-book/russia-programs/2017-12-12/nato-expansion-what-gorbachev-heard-western-leaders-early
The documents reinforce former CIA Director Robert Gates’s criticism of “pressing ahead with expansion of NATO eastward [in the 1990s], when Gorbachev and others were led to believe that wouldn’t happen.”[1] The key phrase, buttressed by the documents, is “led to believe.”