The Hebrew text was like the Greek NT; it had accumulated copyist errors, a few intentional, a good number accidental, between the Malachi days of 440 BCE and Rabbi Judah ha-Nasi (135 to 217 CE). The same thing happened to the Greek New Testament from about 400 CE to 1550 CE, a period of copyist errors.
How Did We Get the Old Testament Text?
The Old Testament, the inspired Word of God, how was it copied, maintained as to the textual reliability, and handed down throughout the past three thousand years?